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Engine-Codes – GMC – P064C GMC

P064C GMC Code - Glow Plug Control Module

Quick Answer

The P064C diagnostic trouble code (DTC) in GMC vehicles refers to an issue with the Glow Plug Control Module. Common causes include Faulty Glow Plug Control Module, Wiring or connection issues between the control module and glow plugs, Corrosion or damage to the electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P064C GMC indicates Glow Plug Control Module.
Common causes
Common causes include Faulty Glow Plug Control Module, Wiring or connection issues between the control module and glow plugs, Corrosion or damage to the electrical connections.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P064C GMC Description

The P064C diagnostic trouble code (DTC) in GMC vehicles refers to an issue with the Glow Plug Control Module. The Glow Plug Control Module is responsible for controlling the operation of the glow plugs in a diesel engine. Glow plugs are used to heat the combustion chamber in diesel engines during cold starts, ensuring proper ignition of the fuel-air mixture. When the Glow Plug Control Module malfunctions, it can lead to difficulties starting the engine, reduced fuel efficiency, and potentially even engine misfires.

OBDII Code P064C GMC - Glow Plug Control Module
P064C GMC Code - Glow Plug Control Module

Common Causes of P064C GMC

  1. Faulty Glow Plug Control Module
  2. Wiring or connection issues between the control module and glow plugs
  3. Corrosion or damage to the electrical connections
  4. Software or programming issues with the control module
  5. Environmental factors such as moisture or extreme temperatures affecting the control module

Symptoms of P064C GMC

  1. Extended cranking times when starting the engine
  2. Difficulty starting the engine, especially in cold weather
  3. Rough idling or poor engine performance
  4. Engine misfires
  5. Illumination of the check engine light

How to Fix P064C GMC

  1. Diagnose the issue by using a diagnostic scan tool to retrieve the fault codes and perform a visual inspection of the Glow Plug Control Module and related components.
  2. Test the glow plugs and wiring connections to ensure they are functioning properly.
  3. Replace the Glow Plug Control Module if it is found to be faulty. Ensure that the replacement module is compatible with the vehicle's make and model.
  4. Clear the fault codes and reset the vehicle's computer system to ensure the issue has been resolved.
  5. Test drive the vehicle to verify that the symptoms associated with the P064C code have been resolved.

Cost to Fix P064C GMC

The cost of repairing a Glow Plug Control Module issue can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the cost of replacing a Glow Plug Control Module can range from $200 to $500, including parts and labor. However, it is important to note that prices may fluctuate based on the specific diagnosis time and hourly labor rates at auto repair shops. It's recommended to obtain quotes from multiple repair shops to get a more accurate estimate for your particular situation.

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Information for Specific GMC Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P064C GMC Code

1. What are the common symptoms of OBDII code P064C GMC related to the Glow Plug Control Module?

- Common symptoms include rough idling, difficulty starting the engine, reduced fuel efficiency, and the illumination of the Check Engine light.

2. What are the possible causes of OBDII code P064C GMC for the Glow Plug Control Module?

- Potential causes may include a faulty glow plug control module, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or issues with the glow plugs themselves.

3. How can I diagnose the OBDII code P064C GMC for the Glow Plug Control Module?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, conducting a visual inspection of the glow plug system, and testing the glow plug control module and related components for proper functionality.

4. What are some repair tips for addressing OBDII code P064C GMC related to the Glow Plug Control Module?

- Repair tips may include checking and replacing any damaged wiring or connectors, testing and replacing faulty glow plugs, ensuring proper grounding for the glow plug control module, and clearing the trouble code after repairs are completed.

5. Can I drive my vehicle with OBDII code P064C GMC triggered for the Glow Plug Control Module?

- It is not recommended to drive the vehicle with this code triggered, as it can lead to decreased engine performance, potential starting issues, and increased emissions. It is best to address the underlying problem promptly.

6. How much does it typically cost to repair OBDII code P064C GMC related to the Glow Plug Control Module?

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from $200 to $500, including parts and labor. Costs can be higher if additional components need to be replaced.

7. Are there any preventative measures to avoid OBDII code P064C GMC for the Glow Plug Control Module?

- Regular maintenance of the glow plug system, including checking for signs of wear or damage, can help prevent issues that may trigger this trouble code. Additionally, following the manufacturer's recommended service schedule can aid in early detection of potential problems.

8. Can a DIY enthusiast repair OBDII code P064C GMC for the Glow Plug Control Module?

- While some aspects of diagnosis and repair may be within reach for experienced DIY enthusiasts, dealing with electrical components and sensors can be complex. It is recommended to consult a professional mechanic for proper diagnosis and repair of this issue.

9. How long does it take to repair OBDII code P064C GMC for the Glow Plug Control Module?

- The repair time can vary depending on the exact cause of the trouble code and the extent of the necessary repairs. In general, it may take anywhere from a couple of hours to half a day to address this issue.

10. Can ignoring OBDII code P064C GMC for the Glow Plug Control Module cause further damage to my vehicle?

- Ignoring this trouble code can lead to increased fuel consumption, potential damage to other engine components, and overall decreased performance. It is advisable to address the issue promptly to avoid further damage.

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