Error Code P0A21: What It Means & What To Do?

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The trouble code P0A21 can be explicated as Motor Torque Sensor Circuit Intermittent. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

The brighter you are, the more you have to learn! That’s why we are here to provide you more knowledge about the P0A21 trouble code. If the engine control module would detect a variation in the voltage coming from the motor torque sensor that is outside the parameters set by the automobile manufacturer, then it would store the P0A21 error code. This would also give rise to the illumination of the check engine light.

What causes this problem with the Motor Torque Sensor Circuit Intermittent?

• Defaults in the motor torque sensor
• Motor torque sensor harness is open or shorted
• Motor torque sensor circuit poor electrical connection

1. Powertrain Control Module - OBD Code P0A21 can appear because of faulty Powertrain Control Module.
2. Auto Transmission Shift Solenoid - There can be some issues with the Auto Transmission Shift Solenoid due to which you may see P0A21 code appearing over and over again. Visit us to buy best quality Auto Transmission Shift Solenoid online.
3. Engine Control Module - Are you facing some faults in your Engine Control Module? Don’t worry and get them replaced or else P0A21 code can turn up.
4. Motor Assembly - Common cause behind this P0A21 error code can be some fault in Motor Assembly. So it will be a good decision to replace them now.
5. Motor Torque Sensor - Engine Control Module is perfectly fine but still but having that trouble code P0A21 flashing? In such a situation your Motor Torque Sensor might be faulty. Why don’t you think of getting that replaced?

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0A21 here:

Common Symptoms

• Check engine light might come into signal

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0A21:

• It is essential to restore the flawed powertrain control module
• Repair or replace the quirky motor torque sensor harness
• Carefully adjust the faults in the motor assembly
• Adjust the flawed motor torque sensor circuit
• Rehabilitate the defaults in the motor torque sensor
• You must fix the defective auto transmission shift solenoid 

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• As an initial step the mechanic will carefully inspect the vehicle with the help of a scanner.
• After this, the technician will connect a scanner to the diagnostic code so that he can recover all the codes and freeze frame data.
• Note down this information as it can clearly help for further diagnosis.
• After careful inspection, he will reset the code and test drive your vehicle to check for reappearance of the codes.
• He will know that an intermittent condition persists, if the code does not return instantly.
• But if the error code returns quickly, the vehicle is test driven, and then he has to inspect the transmission fluid.
• The transmission fluid can be dirty or there can be any blocks in the transmission filter which can be replaced instantly.
• At times, the fluid level will be insufficient which has to be fixed immediately. If he comes across any leaky areas, he will fix them too.
• Once the fluid is checked for appropriate level, then every other component like wires and connectors have to be checked for possible damages.
• If any of the component is damaged, the mechanic will replace them quickly.
• Most often, whenever the mechanic carries out any repair work, he will reset the code and test drive your car, to check if the codes return immediately. This can preferably help the mechanic to know what caused this error code in the vehicle.

Common Mistakes When Diagnosing the P0A21 Code

• Powertrain control module might start failing
• Some issues related to the wiring
• Faults in the hybrid transaxle assembly

P0A20 - Motor Torque Sensor Circuit High