P067C 2018 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code P067C for a 2018 GMC Sierra specifically indicates an issue with the glow plug control circuit in cylinder 5 of the engine. Common causes include Faulty glow plug in cylinder 5, Defective glow plug control module, Damaged wiring harness or connectors. 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
- P067C 2018 GMC Sierra indicates Cylinder 5 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 5, Defective glow plug control module, Damaged wiring harness or connectors.
- 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 P067C 2018 GMC Sierra Description
The diagnostic trouble code P067C for a 2018 GMC Sierra specifically indicates an issue with the glow plug control circuit in cylinder 5 of the engine. Glow plugs are crucial components in diesel engines, as they help warm up the combustion chamber for easier starting, especially in cold weather conditions. When the control circuit for the glow plug in cylinder 5 is experiencing low voltage, it means that there is a problem with the electrical system responsible for activating the glow plug in that particular cylinder.
Common Causes of P067C 2018 GMC Sierra
- Faulty glow plug in cylinder 5.
- Defective glow plug control module.
- Damaged wiring harness or connectors.
- Corrosion or poor electrical connections in the glow plug circuit.
- Issues with the vehicle's battery or charging system affecting voltage supply.
Symptoms of P067C 2018 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or misfires upon startup.
- Reduced engine power and acceleration.
- Illumination of the check engine light on the dashboard.
- Increased emissions or reduced fuel efficiency.
How to Fix P067C 2018 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the glow plug control circuit, using a diagnostic scanner to retrieve the trouble code and pinpoint the exact issue.
- Inspect the glow plug in cylinder 5 to determine if it is functioning correctly. Replace the glow plug if it is found to be faulty.
- Check the glow plug control module, wiring harness, and connectors for any signs of damage or corrosion. Repair or replace any components as needed.
- Test the voltage supply to the glow plug circuit to ensure it is within the manufacturer's specifications.
- Clear the trouble code from the vehicle's computer system after completing the repairs and test the vehicle to confirm that the issue has been resolved.
Cost to Fix P067C 2018 GMC Sierra
The typical repair costs for addressing a cylinder 5 glow plug control circuit low voltage issue in a 2018 GMC Sierra can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, replacing a single glow plug can cost between $50 and $150, while replacing the glow plug control module or repairing wiring harnesses and connectors can range from $100 to $500 or more. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair bill can add up to several hundred dollars or more, depending on the complexity of the issue and the rates in your area. It's advisable to consult with a qualified mechanic or dealership for a more accurate estimate based on your vehicle's specific needs.
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