Guide To P0C21 OBD Error Code Solutions

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The trouble code P0C21 can be explained as Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low. 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.

Do you want to know more about the P0C21 fault code? Don’t worry! Parts Avatar Canada is here at your service. If the engine control module would detect a variation in the voltage coming from the auxiliary transmission fluid pump that is outside the parameters set by the automobile manufacturer, then it would store the P0C21 error code. This would also give rise to the illumination of the check engine light.

What causes this problem with the Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low?

• Some issues related to the auxiliary transmission fluid pump
• Unlocked auxiliary transmission fluid pump harness
• Unsatisfactory electrical connection in the auxiliary transmission fluid pump circuit

1. Engine Control Module - If there is any corrosion or breaks in the internal wiring of the harness, then it can cause a short in the ECM or can also cause corrosion in the ECM through the wiring harness. You can always rely on us as we have best auto parts for our customers.
2. Transmission Fluid Pump - Faulty transmission fluid pump can cause harsh shifts and audible transmission noise. This leads to decreased performance and chances of increased physical damages to the transmission components. Thus, replace it immediately.
3. Powertrain Control Module - The onboard computer, or powertrain control module is the brain of the engine control system. Now if the brain is not working properly, then neither is the car engine. Get it replaced before the situation gets worse.
4. Transmission Fluid Pump Harness - The fluid pump harness can also be faulty causing transmission to underperform due to transmission slipping and harsh shift. Thus, check for harness faults and replace it now!
5. Electronic Control Unit - Is your car jump starting on reverse polarity? Or are you facing some intermittent starting issues? If yes, then it indicates that your electronic control unit is bad. So, it is very important to replace the defective electronic control unit with us at equitable prices.
6. Diagnostic Tools - Buy quality diagnostic tools to check and diagnose OBD code P0C21 error with the help of experienced mechanic. Visit us today!

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P0C21? Your wish is our demand. Have a look at them below:

Common Symptoms

• Check engine light might come into signal
• The automobile might not move at all

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Rehabilitate the defaults in the electronic control unit
• The malfunctioning auto transmission fluid pump should be repaired or replaced as per the need
• Carefully adjust the faults in the auxiliary transmission fluid pump harness
• The PCM/ECM should be restored to working order
• Recondition the non-functioning auxiliary transmission fluid pump
• It is necessary to perform proper service of the unsound auto transmission oil pump
• Adjust the flawed auxiliary transmission fluid pump circuit

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of priced engine control module, transmission fluid pump, automatic transmission fluid pump harness, motor control module boot, automatic transmission oil cooler pump, transmission cooler pump and a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0C21 code to be stored:

• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the solenoid itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and solenoid to check the resistance.
• If the solenoid or the control modules are not faulty, he will then retune the code and test drive the vehicle.
• On test driving, if the P0C21 code does not return soon, he will know that an erratic condition exits.
• But if the error returns instantaneously, he will check every components of the control module as well as the circuit like connectors, wires, harness, fuses etc for any possible fault.
• If any component is damaged, he will fix them right away.
• After performing this repair, he will inspect the transmission fluid as well as its level.
• If the level is below the manufacturer’s specification, it has to be refilled and if the fluid is murky or contaminated it needs to be replaced.
• Every time a repair work is carried out, make sure that the mechanic test drives the vehicle after every repair so that the diagnosis is successful. This can eventually help him to know as to where the error occurred.

Common Mistakes When Diagnosing The P0C21 Code

• Malfunctioning auxiliary transmission pump
• There can be a failure in the drive motor generator power inverter control module