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 the car's computer has detected a problem with the glow plug in cylinder number 5. Glow plugs help the engine start, especially when it's cold.
The P06C9 code is triggered when the Engine Control Module (ECM) detects an issue with the glow plug circuit in cylinder 5. This could be due to an incorrect resistance or a malfunction in the glow plug itself.
The glow plug is an essential component in diesel engines, aiding in the combustion process by heating the air in the cylinder. If the ECM detects that the resistance of the glow plug in cylinder 5 is outside the expected range, it will set the P06C9 code.
• Difficulty starting the engine, especially in cold weather
• Check Engine Light illuminated
• Rough idle or misfiring
• Faulty glow plug in cylinder 5
• Wiring issues or poor connections in the glow plug circuit
• Faulty ECM or software issue
Glow Plug: A device used to heat the air in a diesel engine to aid in starting.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the glow plug and wiring for damage or poor connections.
• Test the resistance of the glow plug to ensure it is within specifications.
• Replace the faulty glow plug in cylinder 5.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-250 Super Duty
• Chevrolet Silverado 2500HD
• Ram 2500
• Regularly inspect glow plugs and wiring.
• Ensure proper maintenance of the engine and electrical system.
• Use high-quality fuel to prevent carbon buildup.
Engine Performance
• Have the vehicle inspected by a professional if the Check Engine Light comes on.
• Avoid prolonged driving with this code to prevent further engine issues.
Glow plugs may be covered under the vehicle's powertrain warranty. Check with the manufacturer or dealer.
Glow plug issues have been common in diesel engines, especially in older models, due to wear and tear over time.
Moderate – It is advisable to address this issue soon to avoid starting problems.
Driving with a malfunctioning glow plug can lead to increased emissions and potential engine damage.
• Engine cold start
• Ambient temperature below 50°F
The glow plug for cylinder 5 is located in the engine's cylinder head, typically accessible from the top of the engine.
Q: What happens if I ignore the P06C9 code?
A: Ignoring this code can lead to difficulties starting the engine and potential damage to the engine over time.
Q: Can I drive with a P06C9 code?
A: While you may be able to drive, it's not recommended as it could lead to starting issues and increased emissions.
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