P068E GMC Code - Cylinder 8 Glow Plug Control Circuit Low Voltage
Quick Answer
The P068E GMC code indicates that there is a low voltage condition detected in the cylinder 8 glow plug control circuit. Common causes include Faulty glow plug control module, Damaged wiring or connectors in the glow plug control circuit, Failed glow plugs. 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 GMC 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, Failed glow plugs.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P068E GMC Description
The P068E GMC code indicates that there is a low voltage condition detected in the cylinder 8 glow plug control circuit. Glow plugs are used in diesel engines to assist with cold starts by heating the combustion chamber. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel-air mixture. If the glow plug control circuit is experiencing low voltage, it can lead to issues with starting the engine, reduced fuel efficiency, and potentially engine misfires.
Common Causes of P068E GMC
- Faulty glow plug control module
- Damaged wiring or connectors in the glow plug control circuit
- Failed glow plugs
- Corrosion or poor connections in the glow plug system
- Electrical issues in the vehicle's electrical system
Symptoms of P068E GMC
- Difficulty starting the engine, especially in cold weather
- Rough idling or engine misfires
- Reduced fuel efficiency
- Engine power loss
- Illumination of the Check Engine Light
How to Fix P068E GMC
- Diagnose the issue using a diagnostic scanner to confirm the P068E code and pinpoint the exact cause of the low voltage condition.
- Inspect the glow plug control module, wiring, and connectors for any visible damage or corrosion. Repair or replace as needed.
- Test the glow plugs for proper functionality and replace any faulty ones.
- Clear the diagnostic trouble codes from the vehicle's computer and test the vehicle to ensure the issue has been resolved.
- Perform a cold start test to verify that the glow plug control circuit is operating correctly.
Cost to Fix P068E GMC
The typical repair costs for addressing a P068E GMC code can range from $200 to $500, including parts and labor. However, the actual cost may vary depending on the specific vehicle make and model, the location of the repair shop, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic or repair shop to get an accurate estimate based on your vehicle's specific requirements.
Need more information about the P068E GMC code?
Need more information on how to fix the P068E GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P068E GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P068E 2014 GMC Sierra — Cylinder 8 Glow Plug Control Circuit Low Voltage
- P068E 2015 GMC Sierra — Cylinder 8 Glow Plug Control Circuit Low Voltage
- P068E 2016 GMC Sierra — Cylinder 8 Glow Plug Control Circuit Low Voltage
- P068E 2017 GMC Sierra — Cylinder 8 Glow Plug Control Circuit Low Voltage
- P068E 2018 GMC Sierra — Cylinder 8 Glow Plug Control Circuit Low Voltage
Frequently Asked Questions about P068E GMC Code
What does OBDII code P068E mean on a GMC vehicle?
Code P068E indicates a low voltage issue in the glow plug control circuit for cylinder 8.
What are the common symptoms of code P068E in a GMC?
Symptoms may include difficulty starting the engine, rough idling, reduced engine performance, and an illuminated check engine light.
What causes code P068E in GMC vehicles?
Common causes include a faulty glow plug for cylinder 8, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.
Can driving with code P068E cause damage to my GMC vehicle?
Driving with this code may cause starting issues and reduced performance, but long-term neglect can lead to further engine problems in diesel vehicles.
How can I diagnose code P068E on a GMC?
Use an OBDII scanner to confirm the code, inspect the glow plug control circuit wiring and connectors, and test the cylinder 8 glow plug for proper function.
What tools are needed to fix code P068E in a GMC vehicle?
You’ll typically need an OBDII scanner, a multimeter for testing voltage, and basic hand tools to replace faulty components.
How much does it cost to repair code P068E on a GMC?
Repair costs can vary but typically range from $100 to $300, depending on whether the glow plug or control module needs replacement.
Can I fix code P068E on my GMC myself?
If you have experience with basic vehicle repairs, you can inspect the wiring, test the glow plug, and replace components as needed.
How do I prevent code P068E from occurring again?
Regular maintenance, such as inspecting the glow plug system and replacing worn components, can help prevent recurrence.
What is the role of a glow plug in GMC diesel engines?
Glow plugs heat the air in the combustion chamber to aid engine starting in cold conditions, especially in diesel engines.
Discuss the causes and fixes for P068E GMC OBDII Code
Code P068E GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.