P068D 2016 GMC Sierra Code - Cylinder 7 Glow Plug Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P068D for a 2016 GMC Sierra indicates an issue with the Cylinder 7 Glow Plug Control Circuit High Voltage. Common causes include Faulty glow plug in Cylinder 7, Damaged wiring harness connected to the glow plug, 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
- P068D 2016 GMC Sierra indicates Cylinder 7 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in Cylinder 7, Damaged wiring harness connected to the glow plug, 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 P068D 2016 GMC Sierra Description
The diagnostic trouble code P068D for a 2016 GMC Sierra indicates an issue with the Cylinder 7 Glow Plug Control Circuit High Voltage. This code specifically relates to the glow plug system in the diesel engine of the vehicle. Glow plugs are essential components in diesel engines that help with cold starts by heating the air in the combustion chamber. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel. The control circuit for the glow plug in Cylinder 7 is experiencing high voltage, which can lead to various performance issues.
Common Causes of P068D 2016 GMC Sierra
- Faulty glow plug in Cylinder 7
- Damaged wiring harness connected to the glow plug
- Malfunctioning glow plug control module
- Issues with the vehicle's electrical system
Symptoms of P068D 2016 GMC Sierra
- Rough idling
- Difficulty starting the engine, especially in cold weather
- Poor engine performance
- Decreased fuel efficiency
- Engine misfires
How to Fix P068D 2016 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the Cylinder 7 Glow Plug Control Circuit using a diagnostic scanner.
- Inspect the glow plug in Cylinder 7 to determine if it is faulty and needs replacement.
- Check the wiring harness connected to the glow plug for any damage or loose connections.
- Test the glow plug control module to see if it is functioning correctly or needs to be replaced.
- Clear the diagnostic trouble code from the vehicle's system after completing the repairs and ensure that the issue has been resolved.
Cost to Fix P068D 2016 GMC Sierra
The typical repair costs for addressing a Cylinder 7 Glow Plug Control Circuit High Voltage issue in a 2016 GMC Sierra can range from $200 to $500, 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. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships and lower at independent shops. It is recommended to inquire about local rates to get a more accurate estimate for this repair.
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