Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that helps start the engine when it's cold. It's like having a broken heater for the engine.
The P064C code indicates an issue with the glow plug control module, which is responsible for heating the glow plugs in a diesel engine to aid in cold starting.
The Glow Plug Control Module (GPCM) monitors and controls the operation of the glow plugs in a diesel engine. When the engine control module (ECM) detects a malfunction in the GPCM or its circuit, it triggers the P064C code. This could be due to electrical issues, such as a faulty module, wiring problems, or poor connections.
• Difficulty starting the engine in cold weather
• Check Engine Light is on
• Reduced engine performance
• Faulty glow plug control module
• Damaged wiring or connectors
• Blown fuse related to the glow plug system
Glow Plug: A device used to heat the air in a diesel engine cylinder to aid in starting.
Control Module: An electronic component that manages the operation of a specific system in a vehicle.
• Use an OBD-II scanner to confirm the code.
• Inspect the glow plug control module and its wiring for damage.
• Check the fuse related to the glow plug system.
• Replace the glow plug control module if faulty.
• Repair or replace damaged wiring or connectors.
• Replace any blown fuses.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Dodge Ram 2500
• Regularly inspect glow plug system components.
• Ensure electrical connections are clean and secure.
• Replace glow plugs at recommended intervals.
Engine Performance
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid starting the engine repeatedly in cold conditions until the issue is resolved.
Check vehicle warranty for coverage on engine components.
This code has been associated with diesel engines since the adoption of OBD-II standards, often appearing in cold climates.
Moderate – Addressing this issue is important to ensure reliable engine starting in cold conditions.
Driving with a malfunctioning glow plug system may lead to increased emissions and reduced engine performance.
• Cold weather conditions
• Engine off for an extended period
The Glow Plug Control Module is typically located near the engine or under the hood, often mounted on the firewall or engine block.
Q: Can I drive with a P064C code?
A: While you can drive with this code, it may be difficult to start the engine in cold weather, and it's best to have it fixed soon.
Q: How do glow plugs work?
A: Glow plugs heat up to help start a diesel engine by warming the air in the cylinders, making it easier to ignite the fuel.
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