P068F 2017 GMC Sierra Code - Cylinder 8 Glow Plug Control Circuit High Voltage
Quick Answer
The P068F diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the glow plug control circuit in cylinder 8. Common causes include Faulty glow plug in cylinder 8, Short circuit in the glow plug control circuit, 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
- P068F 2017 GMC Sierra indicates Cylinder 8 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 8, Short circuit in the glow plug control circuit, 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 P068F 2017 GMC Sierra Description
The P068F diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the glow plug control circuit in cylinder 8. 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. In this case, the high voltage in the control circuit for cylinder 8 indicates an issue with the glow plug system's electrical circuitry.
Common Causes of P068F 2017 GMC Sierra
- Faulty glow plug in cylinder 8.
- Short circuit in the glow plug control circuit.
- Malfunctioning glow plug control module.
- Wiring issues or poor electrical connections.
- Corrosion or damage to the glow plug system components.
Symptoms of P068F 2017 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Reduced fuel efficiency.
- Illumination of the check engine light.
- Increased exhaust emissions.
How to Fix P068F 2017 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the glow plug control circuit for cylinder 8 using a diagnostic scanner.
- Inspect the glow plug in cylinder 8 for any signs of damage or malfunction and replace if necessary.
- Check the wiring and connections in the glow plug control circuit for any shorts or damage, repairing or replacing as needed.
- Test the glow plug control module to ensure it is functioning correctly, replacing it if found to be faulty.
- Clear the DTC and reset the check engine light after completing the repairs.
Cost to Fix P068F 2017 GMC Sierra
The typical repair costs for addressing a P068F code in a 2017 GMC Sierra can vary depending on the specific cause of the issue. Replacing a faulty glow plug may cost between $50 to $100 per plug, while a glow plug control module can range from $150 to $300. Labor costs can add an additional $100 to $200, with total repair costs potentially ranging from $200 to $600. It's important to note that diagnosis time and labor rates can vary, so it's advisable to check with local auto repair shops for a more accurate estimate.
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Frequently Asked Questions about P068F 2017 GMC Sierra Code
What does the OBDII code P068F mean on a 2017 GMC Sierra?
P068F indicates a high voltage issue in the Cylinder 8 Glow Plug Control Circuit, typically related to the glow plug system responsible for aiding engine starting in cold conditions.
What are the common symptoms of code P068F on a 2017 GMC Sierra?
Symptoms may include difficulty starting the engine in cold weather, an illuminated check engine light, and reduced fuel efficiency.
What causes the P068F code on a 2017 GMC Sierra?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or a software issue in the powertrain control module (PCM).
How can I diagnose the P068F code on my 2017 GMC Sierra?
Diagnosis involves checking the Cylinder 8 glow plug for continuity, inspecting wiring and connectors for damage, and testing the glow plug control module for proper operation.
Can I still drive my 2017 GMC Sierra with a P068F code?
While the vehicle may still run, prolonged driving with this code can lead to harder starts in cold weather and potential damage to the glow plug system. It's best to address the issue promptly.
How do I fix the P068F code on a 2017 GMC Sierra?
Repairs may involve replacing the faulty glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it is defective.
Is the P068F code covered under warranty for a 2017 GMC Sierra?
This depends on your vehicle's warranty terms. Check with your GMC dealer to see if the glow plug system components are covered under your powertrain or emissions warranty.
How much does it cost to fix the P068F code on a 2017 GMC Sierra?
Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether the glow plug, wiring, or control module needs to be replaced.
Can a weak battery cause the P068F code on a 2017 GMC Sierra?
Yes, a weak or failing battery can cause voltage irregularities that may trigger the P068F code. Ensure the battery is in good condition before diagnosing further.
Do I need special tools to fix the P068F code on my 2017 GMC Sierra?
Basic tools like a multimeter can help check voltage and continuity. In some cases, an OBDII scanner capable of reading live data may be needed for more advanced diagnostics.
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