P065D OBD Error Code: Problem & Solutions

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The definition of the P065D fault code is Reductant System Malfunction Lamp Control Circuit. If the trouble code P065D is appearing, then it would mean that powertrain control module has detected some fault in the reductant system malfunction lamp control circuit.

Do want to know more about the P065D trouble code? The reductant system malfunction lamp is an integral part of the instrument panel. It is designed in such a way in which it can warn the driver of a fault in the reductant system. It is the powertrain control module which will receive a signal from one of the reductant system sensors.

What causes this problem with the Reductant System Malfunction Lamp Control Circuit?

• There can be open or shorted circuit between the PCM and the instrument panel or other controllers
• Programming error in the powertrain control module
• Flaws in the controller or PCM
• Some defects in the reductant system malfunction lamp bulb

1. Automatic Transmission Sensor - There can be some issues with the Automatic Transmission Sensor due to which you may see P065D code appearing over and over again. Visit us to buy best quality Automatic Transmission Sensor online.
2. ABS System Parts - A lot of issues can arise do to defective ABS System Parts. Did you just see P065D code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Powertrain Control Module - Faulty Powertrain Control Module can be the reason why P065D code is flashing. Visit us to purchase top notch Powertrain Control Module online.
4. Auto Transmission Control Module - It is an important auto part which needs full care. A faulty Auto Transmission Control Module can be a reason behind the flashing up of P065D code.
5. Engine Control Module - OBD Code P065D can appear because of faulty Engine Control Module.
6. Engine Control Unit - There can be some issues with the Engine Control Unit due to which you may see P065D code appearing over and over again. Visit us to buy best quality Engine Control Unit online.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Some issues related with the engine drivability
• Some catalytic converter codes can also be stored
• Malfunctioning reductant system malfunction lamp
• Reductant system malfunction lamp can start appearing

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:

• You can always repair or replace the defective controller or PCM
• Make sure to repair an open or shorted circuit between the PCM and the instrument panel or other controllers
• Restore the faulty reductant system malfunction lamp bulb
• If there is some programming error in the powertrain control module, then it should be repaired properly

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Have a look at some steps which you should follow in order to diagnose this fault code:

• If you find out that other reductant system codes are stored, then they should be diagnosed and repaired before you start attempting to diagnose a P065D. It is essential to consult your vehicle information source for technical service bulletins (TSB) that replicate the code stored, vehicle (year, make, model, and engine), and symptoms exhibited. If you find the appropriate TSB, it may yield helpful diagnostic information.
• You will require a diagnostic scanner and a digital volt/ohmmeter to accurately diagnose a code P065D. A reliable source of vehicle information will also be required. Begin by connecting the scanner to the vehicle diagnostic port and retrieving all stored codes and freeze frame data. You will want to write this information down, just in case the code proves to be an intermittent one. After recording all pertinent information, you should clear the codes and test drive the vehicle until the code is reset or the PCM enters readiness mode.
• If the PCM enters readiness mode, the code is intermittent and will be even more difficult to diagnose. The condition, which caused the P065D to be stored, may need to worsen before an accurate diagnosis can be reached. On the other hand, if the code fails to reset and there are no drivability symptoms exhibited, the vehicle can be operated normally. If the P065D is immediately reset, proceed with a visual inspection of system related wiring and connectors.
• Harnesses that have been broken of unplugged should be repaired or replaced as required. If wiring and connectors appear functional, use your source of vehicle information to obtain the appropriate wiring diagrams, connector face views, connector pinout charts, and diagnostic flow charts. Once you have the correct information, use your DVOM to test the reductant system malfunction lamp control circuit at the appropriate pin of the PCM connector. If no reductant system malfunction lamp control output signal is discovered, suspect that the PCM is defective or there is a PCM programming error.
• If a reductant system malfunction lamp control output signal is discovered at the PCM connector, test the corresponding circuit at the reductant system malfunction lamp control circuit pin of the instrument panel connector. If the reductant system malfunction lamp control output signal is not discovered, you have an open circuit between the PCM and the reductant system malfunction lamp in the instrument panel. The circuit should be repaired or replaced and then it should be retested.