Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there is a problem with the part of the car that helps start the engine when it's cold. It's like when a light switch is broken and the light won't turn on.
The P06F6 code indicates that the vehicle's engine control module (ECM) has detected an issue with the control circuit of the second glow plug control module. This can mean the circuit is open or not functioning properly.
The glow plug control module is responsible for heating the glow plugs, which are used to start diesel engines in cold conditions. An open or faulty control circuit in the second glow plug control module can prevent the glow plugs from heating properly, leading to starting issues.
• Difficulty starting the engine in cold weather
• Engine misfires
• Check Engine Light illuminated
• Faulty glow plug control module
• Open or shorted wiring in the control circuit
• Poor electrical connection in the circuit
Glow Plug: A device used to heat the air in a diesel engine cylinder to aid in starting.
Control Module: An electronic device that manages the operation of a specific system in a vehicle.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the glow plug control module.
• Test the glow plug control module for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the glow plug control module if faulty.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect and maintain the glow plug system.
• Ensure all electrical connections are secure.
• Use quality replacement parts.
Engine Performance
• If the vehicle is hard to start, especially in cold weather, have it checked by a professional.
• Do not ignore the Check Engine Light; it can lead to more severe problems.
Check with the vehicle manufacturer or dealership for warranty coverage on the glow plug control module.
This code is common in diesel engines that rely on glow plugs for cold starting. It often appears in colder climates.
Moderate – It may not prevent the vehicle from running, but it can lead to starting issues and should be addressed soon.
Driving with a faulty glow plug system can lead to increased emissions and potential engine damage.
• Cold weather starting conditions
• Engine off and cool
The glow plug control module is typically located near the engine, often mounted on or near the cylinder head.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to difficulty starting your vehicle in cold weather and may cause further engine damage over time.
Q: Can I drive with this code?
A: While you can drive with this code, it is not recommended as it can lead to starting issues and increased emissions.
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Universal · Digital multimeter
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.