P068F Code - Cylinder 8 Glow Plug Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P068F indicates a problem with the cylinder 8 glow plug control circuit in a diesel engine. Common causes include Faulty glow plug in cylinder 8, Defective glow plug control module, Damaged wiring or connectors in the control circuit. 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
- P068F indicates Cylinder 8 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 8, Defective glow plug control module, Damaged wiring or connectors in the control circuit.
- 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 P068F Description
The diagnostic trouble code P068F indicates a problem with the cylinder 8 glow plug control circuit in a diesel engine. The glow plug is a heating device used to warm up the combustion chamber in diesel engines, especially during cold starts. This code specifically points to high voltage in the control circuit for the glow plug in cylinder 8, which can lead to various performance issues if left unaddressed.
Common Causes of P068F
- Faulty glow plug in cylinder 8
- Defective glow plug control module
- Damaged wiring or connectors in the control circuit
- Electrical issues in the engine's system
- Corrosion or poor connections in the circuit
Symptoms of P068F
- Hard starting, especially in cold weather
- Rough idling or engine vibration
- Decreased fuel efficiency
- Engine misfires
- Check engine light illuminated on the dashboard
How to Fix P068F
- Begin by diagnosing the exact cause of the high voltage in the cylinder 8 glow plug control circuit using a diagnostic scanner and multimeter.
- Inspect the glow plug in cylinder 8 for any signs of damage or malfunction and replace if necessary.
- Check the glow plug control module for faults and replace if found to be defective.
- Inspect the wiring and connectors in the control circuit for any damage, corrosion, or poor connections, and repair or replace as needed.
- Clear the diagnostic trouble code from the engine control module and perform a test drive to ensure the issue has been resolved.
Cost to Fix P068F
The typical repair costs for addressing a cylinder 8 glow plug control circuit high voltage issue can vary depending on the exact cause of the problem and the specific components that need to be replaced. In general, replacing a glow plug can cost between $50 and $150 each, while a glow plug control module can range from $100 to $300. Labor costs can also vary, with hourly rates typically ranging from $80 to $150 per hour. Overall, the total repair cost for this issue can range from $200 to $600 or more, including parts and labor. It's recommended to consult with a professional mechanic to get a more accurate estimate based on the specific vehicle make and model, as well as any additional diagnostic or repair requirements.
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Code P068F Information for Specific Makes
- P068F Chevrolet — Cylinder 8 Glow Plug Control Circuit High Voltage
- P068F Ford — Cylinder 8 Glow Plug Control Circuit High
- P068F GMC — Cylinder 8 Glow Plug Control Circuit High Voltage
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