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P068F Chevrolet Code - Cylinder 8 Glow Plug Control Circuit High Voltage

Quick Answer

The P068F diagnostic trouble code for Chevrolet vehicles indicates an issue with the cylinder 8 glow plug control circuit experiencing high voltage. Common causes include Faulty glow plug in cylinder 8, Wiring issues 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 Chevrolet indicates Cylinder 8 Glow Plug Control Circuit High Voltage.
Common causes
Common causes include Faulty glow plug in cylinder 8, Wiring issues 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P068F Chevrolet Description

The P068F diagnostic trouble code for Chevrolet vehicles indicates an issue with the cylinder 8 glow plug control circuit experiencing high voltage. Glow plugs are used in diesel engines to assist with cold starts by heating the combustion chamber. When the engine is cold, the glow plug control module sends a signal to the glow plugs to heat up, ensuring proper combustion. However, if the control circuit for cylinder 8 is experiencing high voltage, it can lead to various performance issues.

OBDII Code P068F Chevrolet - Cylinder 8 Glow Plug Control Circuit High Voltage
P068F Chevrolet Code - Cylinder 8 Glow Plug Control Circuit High Voltage

Common Causes of P068F Chevrolet

  1. Faulty glow plug in cylinder 8
  2. Wiring issues in the glow plug control circuit
  3. Malfunctioning glow plug control module
  4. Corrosion or poor connections in the circuit
  5. ECM failure

Symptoms of P068F Chevrolet

  1. Difficulty starting the engine, especially in cold weather
  2. Misfires or rough idling
  3. Reduced engine performance
  4. Increased emissions
  5. Poor fuel efficiency

How to Fix P068F Chevrolet

  1. Begin by diagnosing the specific cause of the high voltage in the cylinder 8 glow plug control circuit using a diagnostic scanner.
  2. Inspect the glow plug in cylinder 8 for any signs of damage or malfunction and replace if necessary.
  3. Check the wiring and connections in the glow plug control circuit for any corrosion or damage. Repair or replace as needed.
  4. Test the glow plug control module to ensure it is functioning correctly and replace if faulty.
  5. Clear the diagnostic trouble code from the vehicle's ECM and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P068F Chevrolet

The typical repair costs for addressing a P068F code on a Chevrolet vehicle can vary depending on the specific cause of the issue and the labor rates in your area. In general, the cost of replacing a glow plug can range from $50 to $150 per plug, depending on the quality and brand. The cost of diagnosing and repairing wiring issues or replacing the glow plug control module can add to the total repair bill. Overall, the total cost for addressing a P068F code can range from $150 to $500 or more, including parts and labor. It is advisable to consult with a professional mechanic to get a more accurate estimate based on your specific vehicle and location.

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Information for Specific Chevrolet Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P068F Chevrolet Code

1. What does the OBDII code P068F mean for a Chevrolet vehicle?

P068F indicates a high voltage issue in the cylinder 8 glow plug control circuit, which is responsible for heating the glow plug used in diesel engines for cold starts.

2. What are the common symptoms of code P068F in a Chevrolet?

Symptoms may include difficulty starting the engine in cold weather, rough idling, decreased engine performance, or an illuminated check engine light.

3. What causes the P068F code to trigger in a Chevrolet vehicle?

Possible causes include a faulty glow plug, damaged wiring, a malfunctioning glow plug control module, or corrosion in the electrical connections.

4. Can a bad glow plug cause the P068F code in my Chevrolet?

Yes, a faulty glow plug in cylinder 8 can cause this code, as it disrupts the proper voltage in the control circuit.

5. How do I diagnose the P068F code on my Chevrolet?

Diagnose by checking the glow plug in cylinder 8, inspecting wiring and connectors for damage, and testing the glow plug control module for faults.

6. Is it safe to drive with the P068F code on my Chevrolet?

While the vehicle may still run, driving with this code can lead to starting issues, especially in cold weather, and may cause further damage to the glow plug system.

7. How much does it cost to fix the P068F code on a Chevrolet?

Repair costs vary but may range from $100 to $300, depending on whether the glow plug, wiring, or control module needs to be repaired or replaced.

8. Can I fix the P068F code on my Chevrolet myself?

If you're experienced with vehicle electronics, you can inspect and replace the glow plug or damaged wiring. Otherwise, it's best to consult a mechanic.

9. How can I prevent the P068F code from occurring on my Chevrolet?

Regular maintenance, including inspecting the glow plugs and electrical connections, can help prevent this code from appearing.

10. Will clearing the P068F code with a scanner fix the issue on my Chevrolet?

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.

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