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 little heater in cylinder 5 of the engine. It's not getting enough power to warm up properly.
The P067C code indicates that the control circuit for the glow plug in cylinder 5 is experiencing low voltage.
The P067C code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the glow plug control circuit for cylinder 5. Glow plugs are used in diesel engines to preheat the combustion chamber for better starting and running in cold conditions. A low circuit condition means there might be an issue with the wiring, connectors, or the glow plug itself.
• Hard starting in cold weather
• Check Engine Light is on
• Rough idle when cold
• Faulty glow plug
• Poor electrical connection
• Damaged wiring harness
Glow Plug: A device used to heat the air in a diesel engine's cylinder to aid in starting.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for cylinder 5 glow plug.
• Test the glow plug for proper resistance.
• Replace the faulty glow plug.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-250 Super Duty
• Chevrolet Silverado 2500HD
• Dodge Ram 2500
• Regularly inspect glow plugs and wiring.
• Ensure proper maintenance of the electrical system.
• Use high-quality replacement parts.
Sensor Issue
• Have the vehicle checked by a professional if you're not comfortable with electrical diagnostics.
• Avoid driving in extremely cold conditions until the issue is resolved.
Glow plugs may be covered under the vehicle's powertrain warranty. Check with the manufacturer or dealer.
Glow plug issues are common in diesel engines, especially in older models or those exposed to harsh conditions.
Moderate – While the vehicle may still operate, it can be difficult to start in cold weather, and prolonged issues can lead to more serious engine problems.
Always ensure repairs are performed by a qualified technician to avoid safety hazards.
• Engine cold start
• Ambient temperature below 50°F
The glow plug for cylinder 5 is located on the engine block, typically on the passenger side for V-type engines.
Q: Can I drive with a P067C code?
A: You can drive with this code, but starting the engine in cold weather might be difficult. It's best to fix it soon.
Q: How do glow plugs work?
A: Glow plugs heat up the air in the combustion chamber of a diesel engine to help it start in cold conditions.
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