Toyota Engine Fault Codes


Failure or errors in the operation of the turbine control module or a malfunction in the operation of the second-row turbine itself. A possible cause may be air leaks, so all pipes and connections of the system must be checked.


If on Toyota Avensis in the back of 270 or another model this code caught fire, this indicates an incorrect position of the engine camshaft.

Possible causes of the malfunction:


If an error occurs, P0012 indicates a malfunction of the valve timing control. The problem may result from a low level of engine fluid in the powertrain. The appearance of the code is sometimes due to improper installation of the camshaft, timing control drive or timing belt.

More on what to check:

  1. Strainers for the solenoid valve for the variable valve timing. These items may be clogged or torn, sometimes they are not installed correctly.
  2. Leakage of engine fluid at the seating surfaces of the valve seals of the valve timing device.
  3. Interruption of the supply of motor fluid to the solenoid valve of the drive mechanism.
  4. Timing drive belt integrity for wear.


Invalid valve timing, opening angle too late


Code P0016 appears as a result of a violation of the relationship between the camshaft and crankshaft. The cause of the problem may be related to the wear of the gears on the pulleys, as well as the malfunction of the sensors, but the second option is less likely. Sometimes the error appears as a result of wear and tension of the timing chain.


Code 0018 reports a phase mismatch in the gas distribution system


P0104 appears when there is a malfunction of the mass air flow sensor


Violation of the fuel balance in the engine. The user needs to find and eliminate the cause of depletion or enrichment of the combustible mixture.


Low efficiency in the operation of the exhaust gas recirculation system. If all the sensors are intact, then you need to check the operation of the pipes and hoses – the cause of the problem may be air leakage. If there is no leakage, the clamps should be checked, since one of them could weaken. If these steps did not help to eliminate the cause, then it may be the microprocessor module.


Combination P0046 reports a malfunction in the turbocharger pressure control solenoid valve. The cause of the error may consist in the failure of the drive pressure device.


Malfunction in the solenoid valve of the turbocharger pressure control system. The drive pressure device may be generating a signal that is too high.


On a car with HBO (gas-balloon equipment) and without it, this error reports a breakdown of the heating component of the second lambda probe. The user needs to check the oxygen controller installed in the second engine bank.


Code P0171 (0171) indicates that the mixture in the cylinders of the power unit of automobiles 1993, 1998, 1999 and other years of production is too lean. The user needs to check engine compression, as well as sensors that may affect the formation of the mixture. This refers to an oxygen controller, as well as a regulator of mass air flow and pressure.


Code P0172 indicates re-enriched air-fuel mixture in the engine cylinders


The combination P0174 appears as a result of over-depletion of the air-fuel mixture


Message about re-enriched mixture in the cylinders of the power unit


The P0300 code on Toyota 1KZ TE, 3YP LPG and other versions of the car denotes multiple random misfires.

Possible causes of the problem:

  • improper compression in the engine cylinders;
  • air leaks;
  • damage to the gasket or cylinder head;
  • malfunction or clogging of the mass air flow sensor;
  • failure of the lambda probe or damage to one of the contacts on the devices;
  • clogged fuel filter;
  • nozzle malfunction.


In the first cylinder of the engine misfires are fixed


The control unit reports misfire in the second cylinder of the power unit


The control unit has detected misfire in the fourth cylinder of the power unit


This combination on cars of 2004 and other years of release appears when the camshaft controller breaks down.


Error P0400 indicates a malfunction in the exhaust gas recirculation system. The user needs to check all the sensors, as well as to verify the integrity of the pipes and hoses.


Malfunctions in the secondary air system. The user needs to perform the operation of the sensors associated with it, as well as make sure that there is no leakage and the integrity of the pipes.


The combination of P0 420 or 0420 appears in the case of low efficiency of the catalytic system, the problem is in the first engine bank. The problem appears within five minutes after starting the power unit. A possible cause of the problem may be a malfunction of the oxygen controller heating system.


Code P0430 is associated with reduced catalytic system performance. The problem should be sought in the second bank of the engine.


P0746 Appears when the pressure solenoid is incorrectly adjusted.P0766Code P0766 reports incorrect adjustment of the solenoid switch device


Malfunction in the solenoid


Code 1130 is associated with the absence of a heated oxygen regulator switch installed at the input. The control unit indicates a malfunction of the controller at number 11. The error is accompanied by the message “adaptive fuel at the limit”.


The combination of P1220 indicates a malfunction in the throttle control systemP1222Common throttle valve control error


Code P1226 (1226) indicates an incorrect fuel supply, which indicates a malfunction in the fuel line. The problem may be both in the sensors and in the leak.


The error indicates increased air pressure and is accompanied by a decrease in engine thrust, possible causes of the malfunction:

  • failure or malfunctioning of the electric pneumatic control valve of the turbocharger;
  • open or short circuit in the vacuum control line;
  • malfunction of a turbocompressor device;
  • damage to the valve of the recirculation system;
  • damage to vacuum tubes or leakage;
  • malfunction of the powertrain control unit.


Possible causes of the error:

  • malfunction of the fuel filter device;
  • leakage or loosening of the fuel pipe clamps (check the integrity of the nut to tighten the fuel pump cover and housing);
  • damage to the fuel pump device.


Incorrect fuel line pressure, too low. In case of error Р1272 (1272), it is necessary to check the operation of the corresponding sensor and make sure that there are no leaks. Perhaps the cause of the problem is a clogged fuel filter installed in the pump. Sometimes the malfunction is a clogged engine nozzle.


Code P1300 or 1300 reports a malfunction in the first ignition coilP1305The combination P1305 (1305) appears when the second ignition coil fails


Error codes P1310 or 1310 is associated with malfunctions in the third ignition coil. The cause of the problem may be the poor contact of the device with the on-board network or distribution node. In some cases, an error occurs as a result of damage to the high-voltage wire or failure of the spark plug.


P1349 or 1349 appears as a result of problems with the VVT ​​valve. The device may be receiving an incorrect signal or the controller connector is damaged. A detailed diagnosis of the contacts and the integrity of the electrical circuits is required. The cause of the problem may be in the electronic engine control unit.


Error P1354 indicates a malfunction in the operation of the VVT ​​valve installed in the right left head of the second engine bank. Often this problem can be solved by rearranging the elements. If these steps do not help, you will have to change the device.


The throttle control mechanism does not respond to the gas pedal


Code Р1604 (1604) for cars 1992, 1997, 1993 and other years of release appears when an unsuccessful attempt to start the engine.

Possible causes of the malfunction:

  • battery discharge or damage;
  • malfunction of the ignition switch or the Start / Stop system;
  • regular use of low-quality fuel;
  • problems in the work of the immobilizer;
  • malfunction of the anti-theft system;
  • critical engine failure;
  • clogged one of the filters affecting the launch;
  • malfunctioning nozzles or oxygen sensors.


Code P1605 indicates an invalid engine idle signal. The causes of the problem can be many, ranging from cylinder malfunctions to the control unit. In practice, the essence of the error usually consists in the malfunction of the knock sensor.


Error P1760 indicates damage to the wiring or failure of the linear solenoid valve for the pressure control circuit. It is possible that the device is in one of the positions.


Malfunction of the drive mechanism for changing the geometry of the intake manifold in the first engine bank. The node hovered in the closed position. It is necessary to verify in detail the operation of the mechanism and, if it is not working, replace the device.


The control unit when error P2008 occurs on cars 2005 and other years of production reports the first damper control valve.


Error P2111 is associated with malfunctions present in the operation of the throttle control system. The mechanism may jam in the open or closed position. Most likely, you will need to replace the drive or the entire assembly.


On Raf 4 vehicles of the first generation, 4WS, D4D and other versions, code 2112 reports problems in the operation of the throttle control drive. The cause of the malfunction may consist in the electric motor of the mechanism or sticking of the product in a closed or closed state.


The combination of P2118 (2118) indicates a malfunction in the operation of the throttle actuator. A detailed diagnosis of the node management system is required – ETCS. If the mechanism operates unstably, with a reduced voltage, this can lead to cutting off the current to the power unit. The ETCS fuse, battery, or battery terminals may be malfunctioning.P2149Code 2149 appears when a wiring is interrupted or another malfunction is associated with an incorrect signal. An incorrect pulse is detected on fuel injector B.


Code P2195 or 2195 appears when the air-fuel mixture is lean. The control unit indicates that the problem is due to readings from the first oxygen controller installed in row 1. The lambda probe itself may be operational.P2197The impoverishment of the air-fuel mixture. A message is received from the first lambda probe located in the second row of cylinders.P2440Malfunction in the switching valve of the secondary air injection system. The mechanism is stuck in the open position; a detailed check is required.


Error P2442 indicates sticking in the open state of the auxiliary air supply valves


The operation of the power unit is regarded by the control unit as incorrect. Engine speed is much lower than the permissible norm. If error C1201 (1201), the driver must diagnose the shafts and the idle speed sensor. The reason may lie in the power unit itself, for example, damage to the head of the unit or gasket.


Damage to the wiring of the solenoid valve SA3. The control unit indicates that the signal from the device arriving at the microprocessor does not correspond to the normalized indicators.


Error C1298 is associated with malfunctions in the operation of the solenoidal pressure control device. If the mechanism is complete, then the problem should be sought in the wiring or in the all-wheel drive control module.


Failure of the pressure sensor installed in the brake master cylinder


Error in the operation of the height control solenoid


Failure of the front speed sensor. The engine control unit captures an invalid signal from the controller.

How To Read Toyota Fault Codes


craig sandeman rotated

Drawing from extensive expertise in the used car parts industry, Craig Sandeman has established himself as a trusted authority in automotive repair. He possesses a deep knowledge of the challenges encountered by individuals seeking reliable car parts, making him a highly sought-after expert in this field.


Potential issues, causes, and solutions have been identified in the above article based on the experiences of car owners and repairers, as well as web materials such as forum blogs and technical support bulletins. This data is supplied exclusively for the purpose of reference. Only appropriately qualified persons should perform repairs and/or changes on your vehicles.

While it’s important to keep in mind, it’s also important to note that the amount of times anything is mentioned here should not be seen as a sign of its reliability or frequency. Various owners, driving in different ways, and caring for their vehicles in distinct ways will cause two identical vehicles to perform differently.

As previously said, this material is supplied primarily for reference reasons; nonetheless, we hope that by doing so, we will be able to supply you with essential knowledge that will allow you to make informed decisions whenever you encounter any of the aforementioned setbacks.

Related Posts