P068C 2016 GMC Sierra Code - Cylinder 7 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code P068C for a 2016 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 7 of the engine. Common causes include Faulty glow plug in cylinder 7, Damaged wiring harness or connector in the glow plug control circuit, Malfunctioning glow plug control module. 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 2016 GMC Sierra indicates Cylinder 7 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 7, Damaged wiring harness or connector in the glow plug control circuit, Malfunctioning glow plug control module.
- 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 2016 GMC Sierra Description
The diagnostic trouble code P068C for a 2016 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 7 of the engine. Glow plugs are crucial components in diesel engines that help with cold starts by heating the combustion chamber. When the control circuit for the glow plug in cylinder 7 is experiencing low voltage, it can lead to difficulties in starting the engine, reduced fuel efficiency, and potential engine misfires.
Common Causes of P068C 2016 GMC Sierra
- Faulty glow plug in cylinder 7.
- Damaged wiring harness or connector in the glow plug control circuit.
- Malfunctioning glow plug control module.
- Issues with the engine's electrical system.
- Corrosion or poor connections in the glow plug circuit.
Symptoms of P068C 2016 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Reduced fuel efficiency.
- Engine misfires or rough idling.
- Illumination of the check engine light.
- Reduced engine performance.
How to Fix P068C 2016 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the glow plug control circuit for cylinder 7.
- Inspect the glow plug in cylinder 7 for proper function and replace if necessary.
- Check the wiring harness and connector for any damage or corrosion and repair or replace as needed.
- Test the glow plug control module and replace if it is found to be faulty.
- Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.
Cost to Fix P068C 2016 GMC Sierra
The typical repair costs for addressing a cylinder 7 glow plug control circuit low voltage issue can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.
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