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Engine-Codes – GMC – P067C 2016 GMC Sierra

P067C 2016 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit Low Voltage

Quick Answer

The diagnostic trouble code P067C for a 2016 GMC Sierra indicates an issue with the Cylinder 5 Glow Plug Control Circuit experiencing low voltage. Common causes include Faulty glow plug in Cylinder 5, Damaged wiring or connectors 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
P067C 2016 GMC Sierra indicates Cylinder 5 Glow Plug Control Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug in Cylinder 5, Damaged wiring or connectors 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 15, 2024
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Code P067C 2016 GMC Sierra Description

The diagnostic trouble code P067C for a 2016 GMC Sierra indicates an issue with the Cylinder 5 Glow Plug Control Circuit experiencing low voltage. Glow plugs are essential components in diesel engines, especially during cold starts, as they heat up the combustion chamber to aid in the ignition process. When the control circuit for the glow plug in Cylinder 5 is not receiving sufficient voltage, it can lead to difficulties in starting the engine, reduced fuel efficiency, and potential damage to the engine over time.

OBDII Code P067C 2016 GMC Sierra - Cylinder 5 Glow Plug Control Circuit Low Voltage
P067C 2016 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit Low Voltage

Common Causes of P067C 2016 GMC Sierra

  1. Faulty glow plug in Cylinder 5.
  2. Damaged wiring or connectors in the glow plug control circuit.
  3. Malfunctioning glow plug control module.
  4. Issues with the vehicle's electrical system.
  5. Corrosion or poor connections in the circuit.

Symptoms of P067C 2016 GMC Sierra

  1. Hard starting, especially in cold weather.
  2. Rough idling or engine misfires.
  3. Decreased power output.
  4. Increased emissions.
  5. Illumination of the check engine light.

How to Fix P067C 2016 GMC Sierra

  1. Begin by diagnosing the specific cause of the low voltage in the glow plug control circuit using a diagnostic scanner to pinpoint the exact issue.
  2. Inspect the glow plug in Cylinder 5 to determine if it is faulty and needs replacement.
  3. Check the wiring and connectors in the control circuit for any damage or corrosion, repairing or replacing them as necessary.
  4. Test the glow plug control module to ensure it is functioning correctly, replacing it if needed.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test the system to verify that the issue has been resolved.

Cost to Fix P067C 2016 GMC Sierra

The typical repair costs for addressing a Cylinder 5 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra can vary depending on the specific cause of the problem. Generally, the cost of replacing a glow plug ranges from $50 to $150 per plug, while the cost of a glow plug control module can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair cost varying based on the number of components that need replacement and the shop's labor rates. It is advisable to consult with a local auto repair shop for a more accurate estimate based on the specific diagnosis and repair needed for the vehicle.

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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 P067C 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P067C in a 2016 GMC Sierra?

The common symptoms include hard starting, rough idling, reduced engine performance, and the illumination of the check engine light.

2. What does the OBDII code P067C indicate in a 2016 GMC Sierra?

Code P067C indicates a low voltage condition in the control circuit of the glow plug for cylinder 5 in a 2016 GMC Sierra.

3. What are the possible causes of the Cylinder 5 Glow Plug Control Circuit Low Voltage code in a 2016 GMC Sierra?

Possible causes include a faulty glow plug, damaged wiring or connectors, a defective glow plug control module, or issues with the vehicle's electrical system.

4. How can I diagnose the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in my 2016 GMC Sierra?

Diagnosing the issue involves checking the glow plug for cylinder 5, inspecting the wiring and connectors for damage, testing the glow plug control module, and verifying the vehicle's electrical system.

5. Can a DIY enthusiast repair the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra?

While some basic troubleshooting and inspections can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair of this code.

6. What are the implications of ignoring the P067C code in a 2016 GMC Sierra?

Ignoring the code can lead to potential starting difficulties, rough running engine, decreased fuel efficiency, and possible damage to the engine over time.

7. How much does it typically cost to repair the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra?

The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the glow plug, repairing wiring, or addressing issues with the control module, with costs ranging from $100 to $500 or more.

8. Can the Cylinder 5 Glow Plug Control Circuit Low Voltage code be intermittent in a 2016 GMC Sierra?

Yes, the code can sometimes be intermittent, especially if the issue is related to loose connections or wiring problems that only occur under certain conditions.

9. Are there any preventive measures to avoid the Cylinder 5 Glow Plug Control Circuit Low Voltage code in a 2016 GMC Sierra?

Regular maintenance, such as checking the glow plugs during scheduled service intervals, inspecting wiring for damage, and keeping the electrical system in good condition, can help prevent this code from occurring.

10. Is it safe to continue driving a 2016 GMC Sierra with the Cylinder 5 Glow Plug Control Circuit Low Voltage code?

It is generally not recommended to drive the vehicle with this code active, as it can lead to performance issues and potential damage to the engine. It is best to have the issue diagnosed and repaired as soon as possible.

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