P068C 2014 GMC Sierra Code - Cylinder 7 Glow Plug Control Circuit Low Voltage
Quick Answer
The P068C diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the cylinder 7 glow plug control circuit experiencing low voltage. Common causes include Faulty glow plug in cylinder 7, Damaged wiring or connectors in the control circuit, Malfunctioning glow plug relay. 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
- P068C 2014 GMC Sierra indicates Cylinder 7 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 7, Damaged wiring or connectors in the control circuit, Malfunctioning glow plug relay.
- 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 P068C 2014 GMC Sierra Description
The P068C diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the cylinder 7 glow plug control circuit experiencing low voltage. Glow plugs are essential components in a diesel engine's cold starting process, as they heat up the combustion chamber to facilitate ignition when the engine is cold. The control circuit is responsible for regulating the power supply to the glow plug in question.
Common Causes of P068C 2014 GMC Sierra
- Faulty glow plug in cylinder 7
- Damaged wiring or connectors in the control circuit
- Malfunctioning glow plug relay
- Issues with the engine control module (ECM)
- Corrosion or poor electrical connections
Symptoms of P068C 2014 GMC Sierra
- Extended cranking times before the engine starts
- Rough idling or engine misfires
- Reduced engine performance
- Illumination of the check engine light
- Increased fuel consumption
How to Fix P068C 2014 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage issue, such as testing the glow plug, checking the wiring and connectors, and verifying the functionality of the glow plug relay.
- Replace the faulty glow plug in cylinder 7 if necessary, ensuring it is properly seated and connected.
- Repair any damaged wiring or connectors in the control circuit, and clean any corroded connections to ensure a solid electrical connection.
- Test the glow plug relay and replace it if it is found to be malfunctioning.
- Clear the DTC and reset the ECM to see if the issue has been resolved, then perform a test drive to verify that the symptoms are no longer present.
Cost to Fix P068C 2014 GMC Sierra
The typical repair costs for addressing a P068C code on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the parts required for repair. In general, replacing a glow plug can range from $50 to $150 per plug, while repairing wiring or connectors may cost between $100 and $300. The cost of a glow plug relay can be around $50 to $150. Labor costs can add to the total expense, with rates typically ranging from $80 to $150 per hour at most auto repair shops. It's recommended to consult with a professional technician for a more accurate estimate based on the specific circumstances of the vehicle.
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