P068E 2015 GMC Sierra Code - Cylinder 8 Glow Plug Control Circuit Low Voltage
Quick Answer
The P068E diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the cylinder 8 glow plug control circuit experiencing low voltage. Common causes include Faulty glow plug control module, Damaged wiring or connectors in the glow plug control circuit, Defective glow plug in cylinder 8. 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
- P068E 2015 GMC Sierra indicates Cylinder 8 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug control module, Damaged wiring or connectors in the glow plug control circuit, Defective glow plug in cylinder 8.
- 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 P068E 2015 GMC Sierra Description
The P068E diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the cylinder 8 glow plug control circuit experiencing low voltage. Glow plugs are essential components in diesel engines, as they heat the combustion chamber to facilitate cold starts. When the engine is cold, the glow plug control module sends a signal to the glow plugs to heat up, aiding in the combustion process. In this case, the low voltage in the circuit for cylinder 8 indicates that there may be an issue with the glow plug control module, wiring, or the glow plug itself.
Common Causes of P068E 2015 GMC Sierra
- Faulty glow plug control module.
- Damaged wiring or connectors in the glow plug control circuit.
- Defective glow plug in cylinder 8.
- ECM not sending proper signals to the glow plug control module.
- Corrosion or poor connections in the circuit.
Symptoms of P068E 2015 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or misfiring when the engine is cold.
- Decreased fuel efficiency.
- Increased emissions.
- Illumination of the check engine light on the dashboard.
How to Fix P068E 2015 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the cylinder 8 glow plug control circuit using a diagnostic scanner to pinpoint the issue.
- Inspect the wiring and connectors in the glow plug control circuit for any damage or corrosion, repairing or replacing as necessary.
- Test the glow plug in cylinder 8 to ensure it is functioning correctly, replacing it if found to be faulty.
- Check the glow plug control module for proper operation, replacing it if it is determined to be the cause of the low voltage.
- Clear the DTC from the vehicle's ECM after completing the repairs and test the vehicle to ensure the issue has been resolved.
Cost to Fix P068E 2015 GMC Sierra
The typical repair costs for addressing a P068E code in a 2015 GMC Sierra can vary depending on the specific cause of the issue. Replacement glow plugs can range from $20 to $50 each, while a glow plug control module may cost between $100 and $200. Labor costs can vary, but on average, you can expect to pay between $150 and $300 for the repair. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and the extent of the repair needed. Be sure to consult with a qualified mechanic or repair shop for a more accurate cost estimate.
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