P067F GMC Code - Cylinder 6 Glow Plug Control Circuit High Voltage
Quick Answer
The P067F diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the cylinder 6 glow plug control circuit experiencing high voltage. Common causes include Faulty glow plug in cylinder 6, Malfunctioning glow plug control module, Wiring issues, such as a short circuit or open 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
- P067F GMC indicates Cylinder 6 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 6, Malfunctioning glow plug control module, Wiring issues, such as a short circuit or open 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 P067F GMC Description
The P067F diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the cylinder 6 glow plug control circuit experiencing high voltage. Glow plugs are essential components in diesel engines, as they help with cold starts by heating up the combustion chamber. When the engine is cold, the glow plugs heat up to facilitate combustion, and if one of them is not functioning properly, it can lead to various performance issues.
Common Causes of P067F GMC
- Faulty glow plug in cylinder 6.
- Malfunctioning glow plug control module.
- Wiring issues, such as a short circuit or open circuit.
- Corrosion or poor connection in the glow plug circuit.
- Issues with the engine control module (ECM) sending excessive voltage to the glow plug.
Symptoms of P067F GMC
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Reduced fuel efficiency.
- Illumination of the Check Engine Light.
- Engine performance issues, such as lack of power or acceleration.
How to Fix P067F GMC
- Begin by diagnosing the specific cause of the high voltage condition in the cylinder 6 glow plug control circuit using a diagnostic scanner.
- Inspect the glow plug in cylinder 6 for any signs of damage or malfunction.
- Check the wiring and connections in the glow plug circuit for any faults, such as corrosion or loose connections.
- Test the glow plug control module to determine if it is functioning correctly or needs replacement.
- Clear the DTC and reset the Check Engine Light after completing the repairs to verify that the issue has been resolved.
Cost to Fix P067F GMC
The cost of repairing a cylinder 6 glow plug control circuit high voltage issue can vary depending on the specific cause of the problem and the extent of the damage. On average, the parts required for this repair, such as a new glow plug or control module, can range from $50 to $200. Labor costs at auto repair shops typically range from $80 to $150 per hour. Therefore, the total cost of repairing this issue could be in the range of $150 to $500, including parts and labor. It's recommended to consult with a mechanic or dealership for a more accurate cost estimate based on your vehicle's make and model.
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Information for Specific GMC Models
- P067F 2014 GMC Sierra — Cylinder 6 Glow Plug Control Circuit High Voltage
- P067F 2015 GMC Sierra — Cylinder 6 Glow Plug Control Circuit High Voltage
- P067F 2016 GMC Sierra — Cylinder 6 Glow Plug Control Circuit High Voltage
- P067F 2017 GMC Sierra — Cylinder 6 Glow Plug Control Circuit High Voltage
- P067F 2018 GMC Sierra — Cylinder 6 Glow Plug Control Circuit High Voltage
Frequently Asked Questions about P067F GMC Code
1. What does the OBDII code P067F mean on a GMC?
P067F indicates a high voltage issue in the Cylinder 6 Glow Plug Control Circuit, which may affect the glow plug's ability to preheat the cylinder for cold starts.
2. What are the common symptoms of code P067F on a GMC?
Symptoms can include difficulty starting in cold weather, a rough idle during cold starts, reduced engine performance, and the check engine light being illuminated.
3. What causes the P067F code on a GMC?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or corrosion in the electrical connections.
4. Can I drive my GMC with the P067F code active?
While it may be possible to drive the vehicle, cold starts could become more difficult, and prolonged driving without repairs may lead to further engine or electrical issues.
5. How do I diagnose the P067F code on my GMC?
Diagnosis typically involves inspecting the wiring and connectors for damage, testing the glow plug for Cylinder 6, and checking the voltage output of the glow plug control module.
6. How do I fix the P067F code on a GMC?
Repairs may include replacing the faulty glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if it’s determined to be defective.
7. How much does it cost to fix the P067F code on a GMC?
Costs vary depending on the exact issue, but replacing a glow plug typically costs $100–$300, while control module repairs or replacements may run higher.
8. Is the P067F code specific to GMC vehicles?
No, the code can appear on other diesel vehicles, but the exact diagnosis and repair steps may vary depending on the make and model.
9. Can a bad glow plug cause long-term damage if the P067F code is ignored?
Ignoring a bad glow plug may lead to starting issues and increased wear on the engine, especially in cold climates where proper preheating is critical.
10. What tools do I need to troubleshoot the P067F code on a GMC?
You’ll need an OBDII scanner to read and clear codes, a multimeter to test voltage and resistance, and possibly a service manual for your specific vehicle model.
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