Guide To P064C OBD Error Code Solutions

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What does the error code P064C signify? Do you know what a glow plug control module is? The glow plug control module can perform the internal self-test diagnostics on its own. If there are any failures in at least one of the internal self-tests, it will signal the Engine Control module (ECM) to set the DTC.

The glow plugs are controlled by the glow plug control module which is responsible for starting preheater timer for each cylinder of the glow plugs. Some off the components that are exclusively used in the diesel propulsion system are the Glow plugs, the glow plug timer, and the glow plug controller. In order to heat the combustion chambers, the diesel engines use glow plugs to get a quick cold start. Glow plug control module is an integral part of the PCM, but it can also be used as a stand-alone module. If there is any problem in the glow plug control module detected by the engine control module, then the P064C code will be set. Once the Po64C code is stored in your system, the (MIL) Malfunction Indicator Lamp will be illuminated.

What causes this problem with the Glow Plug Control Module?

• The glow plug control module or PCM is damaged.
• The voltage supply circuit of the glow plug control module is open.
• Error in PCM programming.
• The glow plug control circuit is open or shorted.

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2. Glow Plug - Is your glow plug slow during the start of engine? Are there any damages? Get them replaced with the right one from Parts Avatar.
3. Powertrain Control Module - A faulty or damaged powertrain control module can show up this error code. Replace them with the right replacement part from Parts Avatar.
4. Engine Control Module - If there are any damages or opening in the engine control module, it is always a best choice to get them replaced.

It is vital 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 P064C here:

Common Symptoms

• One or more glow plugs are damaged.
• The engine starts lately during cold weather.
• The engine stands idle during start up.
• Drivability issues in the engine.
• Other codes that are stored in the vehicle.

Want to correct the Trouble Code P064C? Read these points mentioned below:

• Replacing the faulty glow plug relay.
• Fixing the Glow plug circuit.
• Replacing or fixing the damages in the powertrain control module / Engine control module.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P064C code to be stored:

• Connect the scanner to the diagnostic port of the vehicle and recover every of the codes that are stored and freeze frame data. Write down this information, as it can help you in the process if the codes are irregular. Once all the relevant information is recorded, you can clear the codes. Now test drive your vehicle till the PCM enters the readiness mode or till the code is reset.
• If the PCM enters the readiness mode, then it means that the code is irregular and it will be difficult to diagnose further. The circumstance which triggered the P064C code to be stored in the vehicle should be made to worsen before you can actually perform a proper diagnosis to your system. If the code is reset, then you can proceed with your diagnosis
• If there is no presence of voltage or ground in the control circuit of the glow plug though every of the fuses and relays appear to perform properly, you have to inspect the wires and joints that are related to the controller. Additionally, you can also check the ground junctions of the engine and chassis. This additional information can be obtained by using your vehicle’s source to know further about its related circuits.

Common Mistakes When Diagnosing the P064C Code

• The glow plug control module has failed.
• The powertrain control module is ineffective.
• Problem with wires.