Trouble Code P0606 – Powertrain Control Module (PCM) Processor Malfunction

Error code p0606 Toyota

HINT: Use a handheld diagnostic tool to read the frozen parameter set. At the same time that the DTC is stored, the ECM stores vehicle status and driving conditions as a fixed set of parameters. When troubleshooting, data from a fixed set of parameters allows you to determine whether the car was moving at the time of the malfunction or not, whether the engine was warmed up, what the air-fuel mixture was (lean or rich), etc. (Click here).

Connect the handheld diagnostic tool to the DLC3.

Turn the ignition switch to the ON position.

Turn on the portable diagnostic tool.

Enter the following menus: Powertrain / Engine / DTC.

In general, lit up the “festoon” on the Prado. I went to the gas producers, I thought that the problem was with them, but no. Made some diagnostics, showed error P0606.

Maybe someone has already encountered this?

In which direction to move and what is the possible cause of this error?

Error P0606 Toyota Prado: description

Error P0606 on the Prado 120 vehicle can only be determined with a scanner. The “Check Engine” light comes on on the car’s dashboard monitors. It can burn constantly or disappear and then appear again.

P0606 is directly related to the ECM - the combined engine and transmission control module. He is responsible for the following processes in the operation of these nodes:

This module can perform self-diagnosis and, when a problem is detected, turns on the lamp on the “Check Engine” monitor and sends an error code to memory. The mechanic at the service center reads this code using a scanner.

P0606, which appears on a Toyota Prado, Land Cruiser, means that the engine control module itself is faulty. The car owner should immediately check the car for other errors using a scanner. And, if in addition to this combination of digital and other alphabetic characters does not appear, then the problem of error 0606 on the Prado 120 lies in a malfunction of the PCM processor.

Sometimes car enthusiasts reset it by removing the terminal on the battery. However, after 1000 or 2000 kilometers, the “Check Engine” will appear on the screen again.

Checking the engine and automatic transmission will not provide any information. Because when this error appears on the scanner, usually everything works fine in these areas.

Decoding combinations

Gasoline internal combustion engines

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:

If a problem occurs when installing a new drive in the assembly, the mechanism clamp must be adjusted before doing this, otherwise P0810 (control error) cannot be cleared.

Symptoms and causes of error P0606

The cause of this error is the failure of the ECM. Failure can occur as a result of:

These reasons are the result of an overvoltage that has occurred in the electrical network of the car. The malfunction may be caused by a mechanical effect such as a candle holder being pierced - it can be deformed and allow electricity to pass through to the body.

Symptoms of an error include the blinking of the “Check Engine” lamp on the instrument panel monitor.

If an error is detected, you need to pay attention to the behavior of the machine. If the car drives properly, then the error occurs due to a malfunction in the control module. Another cause of ECM failure is road salt that deposits on the ECM contacts. It corrodes them, blocking the correct operation of the control module. Since in damp weather the fumes oxidize the body.

And sometimes the cause of oxidation is a clogged flexible drain hose that connects to the stove evaporator. This hose is located above the ECM housing. And water under pressure begins to ooze out of it.

Symptoms of malfunction

The main driver symptom of P0606 is the MIL (Malfunction Indicator Light). It is also called Check engine or simply “check light”.

They can also appear as:

DTC P0606 is considered serious because it can cause problems with the vehicle's engine and drivability. The engine may suddenly stall or run erratically. For this reason, this error should be resolved as soon as possible.

Troubleshooting P0606

If the control module is defective, only replacing it will help eliminate fault P0606 on the vehicle. You need to contact the dealership, where the installation of a new ECM will be carried out by master mechanics.

If the car owner discovers that the contacts are damaged, then it is necessary to clean them. The procedure is as follows:

After the procedure, you need to reset the “Check Engine” by removing the positive terminal on the battery. Then start the engine and drive about five kilometers. The lamp will no longer flash on the monitor. You should also check the flexible hose for blockages. Tighten the clamp where it connects to the heater evaporator pipe. These measures will help you get rid of the problem.

Error p0606 Prado 120

The ECM continuously monitors the status of its internal memory, internal circuits, and output signals to the throttle actuator. Self-diagnosis ensures proper functioning of the ECM. The ECM turns on the MIL and outputs a DTC when a malfunction is detected. "Mirroring" the main and sub processors diagnoses the ECM status to detect random access memory (RAM) errors. These two processors also perform mutual monitoring. The ECM turns on the MIL and outputs a DTC in the following cases: 1) The output signals of the two processors are different and deviate from the specified values; 2) the signals supplied to the throttle motor differ from the specified values; 3) a deviation in the supply voltage of the throttle valve drive is detected; 4) Any other ECM malfunction is detected.

HINT: These DTCs are detected when the ignition is ON.

TEST SEQUENCE

HINT: Use a handheld diagnostic tool to read the frozen parameter set. At the same time that the DTC is stored, the ECM stores vehicle status and driving conditions as a fixed set of parameters. When troubleshooting, data from a fixed set of parameters allows you to determine whether the car was moving at the time of the malfunction or not, whether the engine was warmed up, what the air-fuel mixture was (lean or rich), etc. (Click here).

Connect the handheld diagnostic tool to the DLC3.

Turn the ignition switch to the ON position.

Turn on the portable diagnostic tool.

Enter the following menus: Powertrain / Engine / DTC.

In general, lit up the “festoon” on the Prado. I went to the gas producers, I thought that the problem was with them, but no. Made some diagnostics, showed error P0606.

Maybe someone has already encountered this?

In which direction to move and what is the possible cause of this error?

Recommendations

Comments 40

I got P0606 this morning. At the same time, when warming up, the revs remain around 1900. The engine does not develop revs of more than three thousand. When you shift gears forward or backward, there is a jerk and stands still. I tried to treat it like this. Turn off the ECU. You turn on the ignition, turn on the ECU, then start it. There is no error, the internal combustion engine is operating normally. If you turn it off, after 10 seconds relay mr312504 starts clicking. And again P0606. The day before there was off-road driving with a deep ford...

The Pajero 4 car is similar in assembly to the Prado. Please tell me how to treat it?

Only to smart gas workers. There may be a problem with some gas injector. As a rule, this error appears due to incorrect operation of the HBO

Gas has nothing to do with it. I arrived in the evening on gas and everything was fine. I started it on petrol in the morning. This morning I left the house and the switch was clicking. I started it up and the error immediately appeared. And when warming up, it doesn’t switch to gas at all, the car almost stalls.

Only to smart gas workers. There may be a problem with some gas injector. As a rule, this error appears due to incorrect operation of the HBO

The reason has been found. But with what difficulty... I came to the officials, they naturally sentenced me to replace the engine block. I went to the guys who did the stitching. They searched for the cause for four hours. They checked all the wiring and found the gas switch oxidized. They replaced it, but no miracle happened. In general, they began to blame the gas control unit. The experts suggested it and arranged a meeting for the next day. So, in the third instance, the repairman fixed the breakdown. The reason turned out to be trivial in that same gas switch. He said that the relay that was installed simply does not fit; there is another one for gas. That's it.

Here you go! I wrote that error P0606 of the stupors is due to the HBO). Congratulations on your decision!

with the engine turned off, 12 V was supplied to the injectors. Accordingly, when the ignition was turned on, the engine block saw this error and went into emergency mode. All this happened due to a faulty gas switch, which apparently did not turn off the voltage. By the way, the switch that was clicking was working properly, it received a signal from the faulty one and it was apparently trying to turn off the voltage all the time, that’s why it clicked

Slow operation or incorrect operation of the front oxygen sensors lead to error P0606 as different parameters appear in the fuel trim settings and the unit cannot adjust this to the required values

And I had the same problem... Is HBO installed?

Yes. I noticed that it usually appears when there is not much gas. But she doesn't always get this error

I’ll tell you at a glance, since I’m not an expert in the subject area. But I suffered a lot with this problem, but I had the following solution: Gas workers connect their equipment to the main computer of the car. Connect via or using OBD2. They do this in order to see the parameters of gasoline injectors (equipment) and LPG injectors (equipment) on the laptop screen when setting up LPG. So, as the HBO tuners explained to me, it is the car processor/computer that sees the additional load and because of this it produces this error. They just cut the wire that connected me to the car computer and that’s it. The error disappeared and has not occurred for about 5 thousand years now. There is a lot of information on this error on the Internet. Especially on Russian sites. If it doesn’t help, I’ll give you links to read. I installed HBO from them: profigas. ua/, they also removed this error for me. In short, try it. PS But there is one more important point. I got it after replacing the spark plugs...

Thank you! Very helpful comment

That damn mistake is dangerous... It disables all stabilization systems... And our cars are not so easy to stop in winter, for example on ice...

By the way, here's what I noticed. This garland begins to light up when there is very little gas in the tank. After refueling it disappears.

I’ll tell you at a glance, since I’m not an expert in the subject area. But I suffered a lot with this problem, but I had the following solution: Gas workers connect their equipment to the main computer of the car. Connect via or using OBD2. They do this in order to see the parameters of gasoline injectors (equipment) and LPG injectors (equipment) on the laptop screen when setting up LPG. So, as the HBO tuners explained to me, it is the car processor/computer that sees the additional load and because of this it produces this error. They just cut the wire that connected me to the car computer and that’s it. The error disappeared and has not occurred for about 5 thousand years now. There is a lot of information on this error on the Internet. Especially on Russian sites. If it doesn’t help, I’ll give you links to read. I installed HBO from them: profigas. ua/, they also removed this error for me. In short, try it. PS But there is one more important point. I got it after replacing the spark plugs...

Tell me what kind of wire was re-wired and how does the car run on gas now?

I've been using gas for almost half a year now without any problems, but I just can't beat the consumption. In Kyiv, the average is 20 liters per 100 km. They cut the wire that connected the gas brains to OBD2. They connected to see the parameters for gasoline and LPG on their setup laptop. And when they cut it, they took 2 computers: 1 for diagnostics of the HBO (the plug was inserted into the diagnostic connector of the HBO), the second for diagnostics on gasoline (the plug was inserted into the diagnostic connector of the car).

What’s interesting is that when you turn on the garlands in the morning, they are gone, and about 20 km away they appear again.

On which cars is this problem most common?

The problem with code P0606 can occur on different machines, but there are always statistics on which brands this error occurs more often. Here is a list of some of them:

• Audi (Audi a4)
• Chevrolet (Chevrolet Volt, Captiva, Cruze, Trailblazer, Epica)
• Citroen (Citroen C3, C4, C5, Picasso)
• Dodge
• Fiat (Fiat Stilo)
• Ford (Ford Connect, Transit, Fiesta, Focus, Ecosport, Escape, F-150)
• GMC Envoy
• Honda (Honda Accord, SRV, Civic)
• Hyundai (Hyundai Tucson)
• Infiniti
• Kia (Kia Rio)
• Land Rover (Land Rover Freelander)
• Lexus (Lexus gs300, gx470)
• Mazda (Mazda 3, Mazda 6)
• Mercedes
• Mitsubishi (Mitsubishi ACX, Outlander, Colt)
• Nissan (Nissan Micra, X-Trail)
• Opel (Opel Antara, Astra, Vectra, Vivaro, Zafira)
• Peugeot (Peugeot 207, 307, 406, 407, 607, 3008, Boxer)
• Renault (Renault Mascot, Megan, Fluence)
• Saab 9-3
• Saturn (Saturn VUE)
• Scion tC
• Skoda (Skoda Octavia, Fabia)
• Subaru
• Toyota (Toyota Corolla, Land Cruiser, Prado, Prius)
• Volkswagen (Volkswagen Crafter, Passat, Polo, Tiguan)
• VAZ
• Gazelle Business, Next, Sobol, ZMZ 405, UMZ 4216
• Lada Granta, Kalina, Niva, Priora

With fault code P0606, you can sometimes encounter other errors. The most common ones are: P0171, P0174, P0345, P0600, P0601, P0602, P0603, P0604, P0605, P0607, P0608, P0609, P0610, P0638, P0642, P1319, P2106, C1201.

Diagnostics and elimination of interruptions (malfunctions) on Toyota Land Cruiser Prado 150 Series

Let's list some common Prado 150 error codes that are detected during diagnostics. Let's look at the possible reasons.

P0606

Prado error 150 p0606. Its cause can be a number of problems, it is detected only by the scanner and is accompanied by a burning light on the “Check Engine” dashboard. The appearance of this Prado 150 error code can be caused by a violation of the internal memory, electrical circuits, or problems with the throttle valve. But more often, fault p0606 is located in the engine control module itself, that is, caused by a breakdown of the ECM.

Prado error 150 p0606 is accompanied by a lit “Check Engine” light on the dashboard.

Rather, the trouble is due to electrical overvoltage, such as when a spark plug blows or road salt corrodes the ECM contacts. Contact oxidation can be caused by a clogged drain hose from the heater evaporator when water leaks from it onto the ECM housing.

P2757

Error p2757 for Prado 150 indicates that you need to check the gear shift solenoid valve (torque converter clutch pressure adjustment). First, the wiring requires attention, then the connector with the valve, then the throttle. Code p2757 may appear after changing the automatic transmission oil if an electrical circuit is accidentally touched. It also appears when the input and output shaft sensor connectors are confused, when water gets into the electrical connector near the automatic transmission, or when the rubber ring on the transmission filter is broken. Also, the reason may be in the ECU, but this is for experienced electricians. (https://www. drive2.ru/l/502358617467388521/).

P0400

Error P0400 Land Cruiser Prado 150
Error Prado 150 p0400 is accompanied by burning slippery road, anti-skid and anti-skid indicators. This code indicates problems in the exhaust gas recirculation system. Cleaning the carbon deposits on the EGR valve may not help if the diaphragm is faulty, the supply hoses are leaky, the cooling pipe coming from the cylinder head is clogged, etc.

C1751

Error C1751 Land Cruiser Prado 150

Error code Prado 150 c1751 indicates a malfunction of the air suspension. In particular, in the relay of a device that closes the electrical circuit of the system. This relay is an intermediary that transmits a signal to the electronic control unit about the degree of filling of the pneumatic cylinders with air. When the operation of the device stops, the signal from it does not enter the ECU, as a result of which the automatic adjustment of ride height stops.

Error code c1751 is interpreted as damage to the compressor relay winding. Although in practice, a breakdown can occur both in the electrical network and directly in the electronic control unit.

Resistance is the main parameter of a working relay. If the measurement does not correspond to the standard factory indicator, then we can confidently conclude that the unit is broken. You can replace the part at a service station, or you can do it yourself.

If the electronic control unit is broken, it is repaired; if the connectors or wires are damaged, they are cleaned, repaired or replaced.

How to Troubleshoot or Reset Trouble Code P0606

Some suggested steps to troubleshoot and fix error code P0606:

1. Inspect the wiring for damage, fraying, breaks, or short circuits. If the wiring is damaged, repair or replace it.
2. Disconnect and check each CAN bus pin using a special diagnostic scanner.
3. Inspect and test the fuse and fuse link.
4. Check the wiring diagram of the relay and fuse system.
5. If the problem persists, the PCM may need to be replaced and reprogrammed.