“Check engine” error on Toyota Corolla – what to do?


The most common 5 reasons for the error

The most common problems when this error occurs are:

  • Oxygen sensor malfunction;
  • The fuel filler cap is not tightly closed;
  • Failure of the exhaust gas catalyst;
  • Malfunction of the mass air flow sensor;
  • Faulty spark plugs or high-voltage wires.

Let's look at each of the reasons in a little more detail. The oxygen sensor is part of the system that processes exhaust gases. This sensor helps control fuel consumption. A malfunction of this sensor is taken as an engine malfunction. That is, the system cannot accurately calculate the fuel supply level and this is precisely why the error occurs. Most Corolla models have from 2 to 4 such sensors, so we should know that an error due to them is possible.

The next option is a loosely sealed fuel tank. On the tank neck of any modern car there is a sensor that is responsible for the tightness of its closure. So if the neck is not closed tightly, the car's computer accepts this as an engine error. Therefore, before suffering from a malfunction, it is worth checking the cover.

The third option may be an exhaust gas catalyst. When it becomes unusable, the car's engine loses its power and due to this, the car's computer may also show an error, since loss of power is a good reason for turning on the error. Loss means some kind of malfunction.

The air flow sensor regulates the amount of air supplied to the fuel for further launch into the engine cylinders. A faulty air supply sensor can lead to an increase in fuel consumption, as well as a decrease in engine power, so the on-board computer may consider this malfunction as an engine error.

Failed spark plugs can also be one of the causes of engine malfunction. The process of incorrect ignition in the engine cylinders usually leads to an error that is generated by the computer. Replacing the spark plugs or adjusting them can correct the problem and eliminate the computer error.

These are the main reasons why the “Check engine” or “Check engine” error appears on a Toyota Corolla. However, to more accurately clarify the problem, we can use self-diagnosis.

Corolla 1.6 engine design

The Corolla 1.6 engine incorporates all the best developments of previous generations of engines from the Japanese manufacturer. The engine has an advanced Dual VVT-i variable valve timing system, a Valvematic valve lift system, and the intake tract has a special design that allows you to change the air flow rate. All these technologies have made the engine the most efficient power unit.

Toyota Corolla 1.6 engine cylinder head

The Corolla's cylinder head is a double cam pastel with "wells" in the center for the spark plugs. The valves are arranged in a V-shape. A special feature of this engine is the presence of hydraulic compensators. That is, you won’t have to adjust the valve clearance again. The only problem is associated with the use of low-quality oil, in which case the channels may become clogged and the hydraulic compensators will cease to perform their function. In this case, a characteristic unpleasant sound will come from under the valve cover.

Self-diagnosis of the “Check engine” error on a Toyota Corolla

Self-diagnosis is a simple and very fast way to eliminate errors and find their causes. To carry it out, we will need a smartphone - in our case, a Samsung phone running on Android. We will also need OVD2-VT - this is a special adapter that, through a wireless connection to the phone, allows you to decipher and eliminate error codes. All this pleasure will cost you 1000 rubles. This is how much the adapter costs, which plugs directly into the diagnostic connector located under the dashboard on the driver’s side.

So we have a broken down car, we bought an ELM and we have a phone. What's next? And then we need to configure our equipment. You should start by installing the software on your phone. We will use a program such as “Torque. By its name, you can easily find it on the Android Market, download it there and install it on your mobile device.

In fact, there are a huge number of similar programs in this application store, but we chose this one due to its convenience. This program can be completely customized for yourself. Setting up indicators that will be displayed during diagnostics, the ability to decipher stakes and reset errors - all this is available in this application. The program is simple and has a nice user interface. The most difficult part of this program is filling in the data about the vehicle being tested. By the way, it is worth noting that not only Corollas are suitable for testing, but also other cars, including makes and models.

Let's proceed directly to self-diagnosis. We have installed the program, after which we need to insert the adapter into a special diagnostic connector. In the photo shown below there is a special connector - it is highlighted in a red circle.

We place the phone on the stand, if one is available. Next we need to start the car and turn on Bluetooth on the phone.

After Bluetooth is turned on, launch the program on the phone. After a few minutes, the program will load and begin transferring data from the adapter to the phone. Which in turn will display engine parameters on the phone screen. The photo below shows the main working screen of the program.

In order for us to diagnose our engine and finally understand why the “Check Engine” light is on, we need to go from the main table to the appropriate section of the program, it is not difficult to recognize it, you can even do this by the engine icon. By clicking on it, the program begins to automatically read the ECU memory. When scanning, errors are detected, if any, of course, which are displayed by indicating the codes and their descriptions. After which, if you have access to the Internet, the program allows you to find out more information from the errors displayed and understand what actually is the cause of your malfunction. And finally, after you have figured out what the problem is, the program gives you the opportunity to erase all errors from memory. After clearing the computer’s memory, the error disappears and the “Check” light stops lighting up on the dashboard and annoying you. Below this process is shown in pictures for greater convenience.

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So, the process of checking the engine of your car is completed, you know its reason and can confidently repair the unit that has become faulty. And the light bulb completely stops burning. In general, an excellent program for solving similar problems with the engine. However, it is disappointing that using such an adapter you can only diagnose the engine, that is, it will not be possible to diagnose the ABS or other components and systems of the car.

It is also worth knowing that resetting a lit light is not always possible, since it is possible that you actually have a serious engine malfunction. So the program can only show the malfunction, and it can reset the error only after repair, that is, after the cause of the error has actually been eliminated.

That's all. The question is quite nervous, but it also has its advantages. For example, the price of the issue, as well as the ability to independently find out the cause and eliminate it, if, of course, you understand your car. Good luck to everyone, and less problems with your pets.

The presence of problems in the Toyota Corolla is indicated by the lighting of the “check engine” indicator. Since with the advent of an on-board computer on such cars, this signal can indicate many problems, the owner of the vehicle should be sufficiently aware of the signals that the car gives him.

So what should you do if the light comes on?

Fixing VSC error in Toyota

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What is VSC?

VSC (Vehicle Stability Control) is a vehicle stability control system designed to maintain vehicle control by adjusting traction and braking force at each wheel. It functions through integrated work with the ABS (traction control) and TRC (automatic traction control) systems.

If the VSC system is faulty, the vehicle becomes insufficiently maneuverable, its drive axle will constantly shift when turning and driving on slippery surfaces, which can lead to an accident.

Normal operation of VSC - the warning lamp lights up when the ignition is turned on and goes out when the engine starts. If the VSC lamp does not go out after starting the engine, it means the system is faulty. (Unless, of course, it is deactivated using the standard button provided by the manufacturer).

7 reasons why VSC error appears

The main possible reasons for a constantly lit VSC light on the dashboard:

  • at least one of the ABS sensors (speed sensor) does not work;
  • The zero calibration of the yaw rate sensor has not been performed;
  • The deceleration sensor “zero” has not been calibrated;
  • incorrect reading of at least one of the ABS sensors (speed sensor);
  • open circuit or short circuit in the heating of the first (first B1S1, B2S1) oxygen sensor;
  • irregular/multiple cylinder misfires;
  • open circuit of the mass air flow (MAF) sensor.

What to do if the check engine light is on

  1. Low-quality fuel: get rid of such fuel and fill your Toyota Corolla with gasoline with a higher octane rating.
  2. Coil failure, no spark, faulty spark plugs: the damaged element must be replaced.
  3. Dirty injectors: clean.
  4. Working with intermittent lambda probe, catalyst: replacement.
  5. The need to check the mesh on the gasoline pump: check the gasoline supply pressure, it should not be lower than 3 atmospheres. If lower, carry out repair work.
  6. Inadequate oil level: Listen to the engine when it is warm. If there are extraneous noises, it's time for repairs.

[flat_ab >

The indicator indicators will help you carry out self-diagnosis of your Toyota Corolla, and special error codes will indicate a specific problem and then you can decide where and how to fix it. If the manipulations to find out the reason for the indicator light are not clear to you, you can always contact the service center.

Self-diagnosis in the garage

The connector for diagnosing the engine is located near the battery or on the left, along the direction of the car. Often this is a plastic box with the inscription “diagnostics” in English.

The Toyota Corolla diagnostic instrument panel is located in the driver's cab. The indicator itself on the display can be in the form of an engine, a spiral or a “check” icon. It depends on the year of manufacture and brand of engine, the icon itself is not so important, what matters is the fault codes.

If the automatic transmission is faulty, this will be known using “Power”, “AT Check”, “OD”. Faults in other units will be displayed through their corresponding light diodes.

Socket No. 2 for diagnosing engine malfunctions is located in the cabin, at the bottom of the panel, and this facilitates trouble-free determination of malfunctions while the Toyota Corolla is in motion.

Most Common Error Codes

Toyota uses the following codes: single-digit and two-digit. Their decoding is presented in the following collection of information:

Fault detection algorithm: [flat_ab >

  1. Under the hood in the “Diagnostic” box, bridge the two chips “E1” and “TE1”.
  2. Start the Toyota Corolla, turn on the air conditioner and heater and watch the indicators on the display.
  3. Frequent blinking (pause less than half a second) more than ten times is evidence of the absence of a recorded malfunction of this type in the memory. The engine will be safe to use. Open the contacts in the fault tester and you can carry out your planned trips.
  4. If the indicator blinks with long pauses (four and a half seconds), there is no need to worry too much: you are in for a minor maintenance-type repair.
  5. The following two types of signal: flashing - pause - flashing - long pause - flashing (fault code 21) or flashing - interval - flashing - long interval - flashing (code 12) indicate the presence of data of this kind in the computer memory and, most likely, you awaiting major renovations.

Here is a detailed video about self-diagnosis:

In order to make sure that the Toyota Corolla malfunctions are correctly diagnosed, double-check the results on the console inside the car, under the driver's seat. If the result is the same, check the table to see what type of malfunction your car has and decide on the method and place to fix the problem.

Toyota Corolla Check Engine Light came on

Toyota Corolla
diagnostic Toyota Corolla has problems displaying the check engine light. People tell me that the Toyota BB BB 1nzfe engine is in place to check the engine check. Since the appearance of a flight attendant on such vehicles can indicate many problems, the vehicle owner should be quite familiar with the signals that the vehicle gives him.

What should I do if the light turns on?

What to do if the check engine lights up.

  1. Poor quality fuel: Get rid of this fuel by filling your Toyota Corolla with higher octane gasoline.
  2. Damaged coil, lack of sparks, faulty spark plugs: the damaged element must be replaced.
  3. Nozzle contamination: clean.
  4. Working with lambda probes, catalysts: replacement.
  5. It is necessary to check the grid on the gas pump: check the gas supply pressure, it should not be lower than 3 atmospheres. Toyota 5e-fe 1.5 cars such as Toyota Corolla 1.8 Corolla, field. Feedback Corella Fielder 1.5 4wd (Toyota Corolla 1.5 FIelel Toyota Corolla Engine. Check engine performance, check engine performance of 2008 Corolla. If below, perform repair work.
  6. Incorrect oil level: Listen to the engine while it is warm. If it's noisy, it's time for repairs.

The characteristics of the indicator will help you perform self-diagnosis of your Toyota Corolla, and special error codes will indicate a specific problem, then decide where and how to fix it, solve it already. If you do not understand the manipulation of the preconditions for the indicator light, you can always contact the service center.

Self-diagnosis in the garage

The engine diagnostic connector is located next to the battery or on the left, towards the vehicle. During the fire inspection, the Corolla robot, the 2008 engine, was checked, discussing topics on the “toyota club ekaterinburg” e1.ru forum. Often this is a plastic box with the word “diagnosis” written in English.

The Toyota Corolla diagnostic advice is located in the driver's cabin. The indicator on the board itself can be in the form of a motor, a spiral, or a check icon. The check light came on after the 2008 Corolla and check engine message. It depends on the make and make of the engine, the badge itself is not that important, the code defects are what matters.

If the automatic transmission is faulty, then this will be understood as “Power”, “AT Check”, “OD”. Faults in other devices will be indicated by corresponding LEDs.

Engine defect socket No. 2 is located in the cab, at the bottom of the panel, and it helps to easily detect defects during certain driving of Toyota Corolla.

Common Error Codes

Toyota uses these codes: specific and two-digit. Check out Toyota Corolla engine troubleshooting. Toyota Corolla on the forum. Existing user? To come in. Engine. The check light came on again. Their transcript is presented in the following collection of information:

Defect detection method:

  1. Under the cover in the diagnostic window, pass two chips E1 and TE1.
  2. Get a Toyota Corolla, turn on the air conditioning, turn on the cooktop, and watch the dashboard lights.
  3. Rapid flashing (pause less than half a second) more than 10 times indicates that there is no corrected fault of this type in the memory. Starting the engine will be harmless. Open your contacts in Fault Checker and you can make your planned trips.
  4. When the light flashes in long pauses (four and a half seconds), you have nothing to worry about: you will find easy repairs depending on the type of service.
  5. The next two types of signals: flicker. pause. flicker. long pause. flickering (DTC 21) or flickering. interval. flicker. long interval. Flickering (code 12) indicates the presence of similar data in the computer's memory and, most likely, all you need is a hard repair.

Toyota Corolla 2009 "check engine" error

Diagnosis of errors P0171 and P0133.

What does CHECK ENGINE mean?

The flow was interrupted by a sudden call, but the main thing was

Here is a detailed video about self-diagnosis:

To check the diagnosis of Toyota Corolla defects, double check the results on the console inside the car under the driver's seat. If the result is the same, check your vehicle's fault chart and determine the method and location to correct the problem.

Toyota Corolla engine failure codes (two-digit system)

Possible breakdowns of the power plant. Codes and their meaning (type 09):

11 — there is no power in the valve control system; 12, 13 - there is no signal about the number of engine revolutions; 14 - there is no negative feedback on the ignition coil; 15 - no signal from the negative contact on the second ignition coil; 16 - no signal from the automatic transmission ECU; 17 and 18 - the camshaft produces unacceptable indicators regarding the position; 21 - incorrect oxygen level indicator; 22 - the power unit is in an unacceptable temperature range; 23, 24 - incorrect data regarding the temperature of the air that is sucked in; 25 - unsaturated mixture for the fuel system; 26 - supersaturated mixture for the engine; 27, 28, 29 - the additional oxygen sensor provides incorrect data; 31 - problems with pressure in the intake manifold or incorrect air flow; 32 - the amount of air flow is determined incorrectly; 34 - problems with boost; 35 - the pressure in the intake manifold is at an unacceptable level; 38 - there was a malfunction of the fluid sensor in the automatic gearbox; 41 - incorrect indicator indicator regarding throttle localization; 42 - vehicle speeding; 43 - there is no starter signal in the engine ECU; 46 - the fourth solenoid valve is faulty; 47 - problems in the functioning of the auxiliary sensor that determines the localization of the throttle; 48 - the system providing additional fuel supply is in a faulty state; 51 - the sensor from the throttle valve does not send a signal regarding the idle speed of the Toyota Corolla; 52, 55 - the knock indicator gives incorrect signals; 53 - malfunction in the circuit regulating the knock sensors; 61 - problems in the operation of the speed measuring device; 62-65 - failure or breakdown of the solenoid valves, possibly the entire circuit; 67 - malfunction of O/D sensors; 71 — imbalance in the gas exhaust recirculation system; 72 — breakdown in the fuel cut-off system; 77 - problems in managing the pressure in the automatic transmission; 78 - the signal from the fuel pump sensor has disappeared; 81—85 — problems in the functioning of the gearbox (its different sections); 86 - the sensors responsible for recording the number of engine revolutions have become unusable; 88 - the relationship between the power plant control unit and the automatic gearbox is broken; 99 - no faults found. [flat_ab > Meaning of Toyota Corolla engine trouble codes (type 10):

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1 - functioning without disturbances; 2 — incorrect air consumption value; 3 - the switch gives an incorrect signal; 4 — the antifreeze temperature is within unacceptable limits; 5 - incorrect readings from the oxygen indicator; 6 - engine speed is unacceptable; 7 - incorrect data about the throttle position; 8 - unacceptable air temperature or incorrect readings of the temperature control sensor; 9 - the sensor responsible for recording the vehicle speed gives incorrect data; 10 - there is no signal about the start of the starter; 11 - a malfunction of the air conditioning system or automatic transmission is in position N.

ABS, TRC problem codes (code 10):

11 - a break was detected in the solenoid (relay) circuit; 12 - a short circuit has occurred in the solenoid relay; 13 - open circuit in the electric motor control relay circuit on the pump; 14 - short circuit in the pump motor circuit; 15—18 — malfunction in the solenoid on the TRC; 21—24 — malfunction in the wheel solenoid circuit; 25—27 — breakdowns in various areas of the TRC; 31—34 — wheel speed sensors provide incorrect signals; 35 and 36 - break in sensors indicating the number of wheel revolutions; 37 - the rotors responsible for monitoring the speed of the rear wheel/wheels are faulty; 41 - voltage surges; 43 - deceleration sensor is malfunctioning; 44 - breakdown in the deceleration sensor when using neutral speed; 45-49; 58 and 61 - breaks in TRS; 51—53 — breakdown of the electric motor on the pump; 55 - insufficient amount of brake fluid or incorrect data from the sensor; 56 and 57 - oil pressure problems; 62 - incorrect operation of devices that count rotational movements in the motor; 71—78 — breakdown of wheel rotation indicators; 79 — malfunction of the deceleration indicator;

Sometimes Toyota Corolla designates fault codes with a five-digit code (one letter and four numbers).

OBD standard codes. The first value is a reading indicating the name of the system where the problem occurred:

P - in the engine or transmission; B - in the back of a Toyota Corolla; C - in suspension; U - in a network system.

Using the numbers, you can accurately determine where the fault is located. Such diagnostics are carried out using special computer programs, and the codes will help you easily choose the right way to fix problems.

Reliability, efficiency, and comfort of the Toyota Corolla are ensured by many components, the most important of which is the electronic self-diagnosis system (SS) for the technical condition of the car. It “reports” error codes, which are then used to determine specific serviceability.

Corolla fault codes cover the most important parts of the car. The system can operate in two modes: normal automatic and forced. In automatic mode, it informs the user about problems that have arisen during the operation of the vehicle. In the forced mode, the user himself, using special procedures, calls from the system information about the technical condition of the node he is interested in. Here we will look at the procedure for self-diagnosis of the Corolla, and start with a brief description of the CC.

Proper diagnostics

The Toyota Corolla diagnostic system consists of sensors that record the physical parameters of components, an electronic control unit (ECU), a program for this unit, as well as a fault indication system.

Initially, the manufacturer entered the reference values ​​of the state parameters of the vehicle components into the ECU memory. During operation, the sensors record the actual values ​​of these parameters and then send them to the electronic control unit. The Corolla ECU compares the received actual parameters with the reference values ​​and, if they do not match, writes a code into memory. After this, the control unit sends an error code to the Toyota Corolla “CHECK” indicator light. When the fault is corrected, the error signal disappears. In addition, it is possible to force the reading of fault codes with or without a scanner.

On the light indicator, error codes are visualized by the number of light signals, as well as the combination of their length and pauses between them. Toyota uses two types of light codes: 09 and 10. 09 is a two-digit code. This means that it starts with the number 11 and ends with the number 99. The duration of the glow - pause is 0.5 seconds. The pause between tens and ones is 1.5 seconds, the pause between ciphers is 2.5 seconds, and between a series of ciphers is 4.5 seconds. For example, two glares with a pause of 0.5 seconds plus one glare after 1.5 seconds corresponds to 21 error codes.

Code 10 is a unique cipher. In it, the number of light pulses corresponds to the fault error code. Just like in the previous cipher, the duration of the lights - pauses is 0.5 seconds. In this case, the pause between ciphers is 2.5 seconds, the pause between a series of ciphers is 4.5 seconds. 12 glares in 0.5 seconds correspond to the 12th fault code error.

During the operation of the Corolla, the need arises for forced diagnostics of individual components of the car. For this, three blocks of diagnostic connectors (DLC - DataLinkConnector) are installed: DLC 1, DLC 2, DLC 3. The DLC 1 connectors are assembled in a diagnostic box labeled “Diagnostic”, which is located under the hood at the rear wall of the engine compartment. Connectors DLC 2, DLC 3 are located inside the car on the driver's side. DLC 2 connectors are installed under the panel, and DLC 3 under the front door. The DLC 2 block is used to read information with special scanners.

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The DLC3 unit has very limited use; it can be found on Corollas with a robotic gearbox.

It should be noted that the location of the scanning blocks may vary slightly under the hood or in the cabin, depending on the make and year of manufacture of the car.

DLC 1 consists of 20 connectors designed for engine and transmission self-diagnosis.

To open the lid of the box, just pull the visible petal. The standard diagnostic procedure is carried out using a scanner. But in the absence of a scanner, the necessary information at home can also be obtained without it. To perform this procedure, perform the following diagnostic steps:

  • Take a paper clip or a piece of wire of the same length.
  • Turn off the ignition and all energy consuming devices.
  • Open the hood and remove the cover from the “Diagnostic” connector block box. On the inside of the cover there are connector markings. Use this marking to locate connectors TE1 and E1.
  • Bend a paper clip or wire into a U shape so that it can be inserted into slots TE1 and E1. When this is ready, insert the wire into these sockets and thereby close them.
  • Turn on the ignition and watch the CHECK indicator.

If it blinks more than eleven times with an amplitude of half a second, then this indicates the absence of errors in the ECU memory, as well as the serviceability of the machine. This encoding corresponds to the 09 cipher. If “CHECK” blinks with an amplitude of four and a half seconds, it means that the car uses code 10 and it is also working.

And if the signals are different, it is necessary to read the code, determine the type of malfunction from the code and, depending on this, take further action. Self-monitoring of other nodes is carried out in a similar way. Only blocks of components and pairs of connectors, as well as indicators on the instrument panel, can be changed.

Causes, decoding and resetting errors on Toyota Corolla

Their decoding is presented in the following collection of information: Method for detecting defects: Start the Toyota Corolla, turn on the air conditioner, heater and watch the indicators on the display. Frequent blinking, a pause of less than half a second, more than 10 times is evidence of the absence of a recorded malfunction of this type in the memory.

The introduction of the motor will not be dangerous. Open the Toyota Corolla check engine light is on in the defect checker and you can Toyota Corolla check engine light is on planned trips. If the indicator flickers with long pauses of four and a half seconds, there is no need to worry too much: a frivolous maintenance-type repair awaits you. The following two types of signal: In order to ensure that the diagnosis of defects in the Toyota Corolla is correct, double-check the results on the console inside the car, under the driver’s seat.

If the result is the same, check the table to see what type of malfunction your car has and decide on the method and place to eliminate the problem.

Toyota Corolla engine failure codes, two-sign system. Probable failures of the power plant.

“Check engine” error on Toyota Corolla – what to do?

Greetings to all forum members. Yesterday I was driving quietly and the check engine light came on, I stopped, opened the hood and I could hear that the engine was somehow not working properly, it was shaking too much and was shaking.

Codes and their meaning type Toyota Corolla, Auris engine The oil filter and oil are changed every 10 km, the replacement date may vary slightly depending on certain operating criteria. This article provides an example of changing the oil for Toyota Corolla cars from the year of manufacture.

Modern scanners

Reading Corolla fault codes with scanners not only simplifies self-monitoring, but also makes it more informative. Today, manufacturers of diagnostic car scanners supply the market with a wide range of them, differing both in functionality and price. On the one hand, such a market is capable of satisfying the needs of various segments of consumers, but on the other hand, it creates certain difficulties, since it requires some special knowledge when purchasing. Here we will only indicate the main types of diagnostic equipment, as well as its purpose. And this will not be a bad guideline for choosing the right scanner. Based on functionality, scanners are distinguished between dealer, brand and multi-brand.

Dealer scanners are produced by automakers or their contractors, usually for a specific car brand. They have a wide range of functionality and are intended for professional use, and the price can reach several thousand dollars.

The group of brand scanners is also intended for professional use. They have functionality similar to that of the dealer, but more modest. The price of branded scanners ranges from several hundred to a thousand dollars.

Multi-brand scanners are most widespread among motorists. They are easy to use and provide sufficient information for most situations. Scanners of this group are unified for several car brands. Therefore, when purchasing, you need to check their ability to read Corolla error codes.

Toyota Corolla error codes

There is some experience with the most common Corolla error codes that can help resolve the problem. Often the CC registers code p0810 for the Toyota Corolla 2006 - 2009 gearbox, which indicates a general clutch position control error. The reasons may be caused by a breakdown of the actuator, TCM or travel sensor.

Trouble code p0900 in Corolla specifically indicates damage to the clutch actuator circuit. The reasons for the appearance of the p0900 signal are an open circuit in the wiring or failure of the Corolla clutch actuator motor.

A series of similar errors p0351, p0354, p0352, p0353 Toyota Corolla indicates defects in the low voltage circuit of the ignition coils. These codes occur due to an open or short circuit in the IGF1 and IGT circuit between the ignition coils (1-4) and the ECM. To eliminate them, first the circuit is tested for a short circuit, then coils 1–4 are checked, if the errors do not disappear, the ECM is replaced.

Relatively often, the Corolla has a speed signal malfunction with code C1541. The error code may be caused by abnormalities in the speed sensor circuit, skid control ECU, CAN communication system, or power steering ECU.

Code P0500 speed sensor signal on Toyota means that the automatic transmission engine control unit does not receive data about the speed of the vehicle. With this error, the Corolla goes into emergency mode. The reasons for the appearance of the code may be an open or short circuit in the speed signal circuit, a malfunction on the Corolla instrument panel, the skid control ECU, or the Corolla speed sensor.

Toyota Corolla gearbox errors

Toyota Corollas of 2006, 2007 and later years of production are characterized by problems with the gearbox, especially often they happen with modifications equipped with a CVT robot. At the same time, the gearbox malfunction check lights up on the dashboard, and computer diagnostics can identify the following problems:

  • Error P0909, indicating a malfunction of the rocker mechanism. In a manual transmission, gear selection is performed by means of an electric drive (actuator), which consists of a pair of electric motors, travel sensors and a gear that drives the engagement shaft of the desired gear in motion. The appearance of error code P0909 means that the travel sensor, the actuator itself or the hinge/fork, which are responsible for the switching process, are faulty.

Diagnostic connectors Corolla 120, 150, 180

Error codes on the diagnostic connector DLC 2 of Corolla 120, 150, 180 are supplied in OBD II format. In OBD format, codes are encrypted with 5 characters: the first literal character and the next four numeric characters. The literal character of this code indicates the node where the problem occurred:

  • P - motor or transmission;
  • B — car body;
  • C - suspension;
  • U - network system

The following numbers indicate the exact location of the breakdown, as well as its classification.

Diagnosis of OBD II error codes is possible only with special scanners or by connecting connectors to a computer with special software. After receiving the Corolla codes, fault diagnosis is carried out using a table describing the error codes and their corresponding defects.

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