P067F 2014 GMC Sierra Code - Cylinder 6 Glow Plug Control Circuit High Voltage
Quick Answer
The P067F diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 6. Common causes include Faulty glow plug: The glow plug in cylinder 6 may have failed, causing the high voltage condition, Wiring issues: Damaged or corroded wiring connecting the glow plug to the control module can lead to high voltage, Glow plug relay malfunction: A faulty relay can disrupt the voltage supply to the glow plug in cylinder 6. 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
- P067F 2014 GMC Sierra indicates Cylinder 6 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug: The glow plug in cylinder 6 may have failed, causing the high voltage condition, Wiring issues: Damaged or corroded wiring connecting the glow plug to the control module can lead to high voltage, Glow plug relay malfunction: A faulty relay can disrupt the voltage supply to the glow plug in cylinder 6.
- 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.
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Code P067F 2014 GMC Sierra Description
The P067F diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 6. Glow plugs are essential components in diesel engines that help with cold starting by heating the combustion chamber. When the engine is cold, the glow plug controller sends a signal to the glow plugs to heat up, facilitating easier ignition of the fuel mixture.
Common Causes of P067F 2014 GMC Sierra
- Faulty glow plug: The glow plug in cylinder 6 may have failed, causing the high voltage condition.
- Wiring issues: Damaged or corroded wiring connecting the glow plug to the control module can lead to high voltage.
- Glow plug relay malfunction: A faulty relay can disrupt the voltage supply to the glow plug in cylinder 6.
- Control module failure: If the control module that regulates the glow plug operation malfunctions, it can result in high voltage in the circuit.
Symptoms of P067F 2014 GMC Sierra
- Hard starting: Difficulty starting the engine, especially in cold weather, can be a symptom of a malfunctioning glow plug in cylinder 6.
- Rough idling: The engine may run rough or unevenly due to improper combustion caused by a faulty glow plug.
- Decreased fuel efficiency: When the glow plug is not functioning properly, the engine may not burn fuel efficiently, leading to decreased fuel economy.
- Check Engine Light: The illumination of the Check Engine Light on the dashboard is a common symptom of a glow plug control circuit issue.
How to Fix P067F 2014 GMC Sierra
- Diagnose the issue: Use a diagnostic scanner to read the DTC and pinpoint the exact cause of the high voltage condition in cylinder 6.
- Inspect the glow plug: Test the glow plug in cylinder 6 to determine if it is functioning correctly. Replace if necessary.
- Check wiring and connections: Inspect the wiring and connections for any damage or corrosion. Repair or replace as needed.
- Test the relay and control module: Check the glow plug relay and control module for proper operation. Replace if faulty.
- Clear DTC and test drive: After completing the repairs, clear the DTC from the vehicle's computer and test drive to ensure the issue has been resolved.
Cost to Fix P067F 2014 GMC Sierra
The cost of repairing a cylinder 6 glow plug control circuit high voltage issue in a 2014 GMC Sierra can vary depending on the specific cause of the problem. On average, the cost of parts for replacing a glow plug can range from $20 to $50 per plug. The cost of a glow plug relay or control module can range from $50 to $200 each. Labor costs, which typically range from $80 to $150 per hour, can add to the total repair bill. Overall, the total cost of repairing this issue can range from $100 to $500, including parts and labor. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.
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