P067A 2016 GMC Sierra Code - Cylinder 4 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code (DTC) P067A for a 2016 GMC Sierra indicates an issue with the Cylinder 4 Glow Plug Control Circuit experiencing low voltage. Common causes include Faulty glow plug in Cylinder 4, Wiring issues or loose connections in the glow plug control circuit, Malfunctioning glow plug relay. 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
- P067A 2016 GMC Sierra indicates Cylinder 4 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in Cylinder 4, Wiring issues or loose connections in the glow plug control circuit, Malfunctioning glow plug relay.
- 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 P067A 2016 GMC Sierra Description
The diagnostic trouble code (DTC) P067A for a 2016 GMC Sierra indicates an issue with the Cylinder 4 Glow Plug Control Circuit experiencing low voltage. Glow plugs are crucial components in diesel engines, particularly during cold starts, as they heat up the combustion chamber to aid in the ignition process. Cylinder 4 refers to the specific cylinder in the engine affected by this code.
Common Causes of P067A 2016 GMC Sierra
- Faulty glow plug in Cylinder 4.
- Wiring issues or loose connections in the glow plug control circuit.
- Malfunctioning glow plug relay.
- Faulty engine control module (ECM).
- Corrosion or damage to the electrical connections related to the glow plug system.
Symptoms of P067A 2016 GMC Sierra
- Difficulties starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Engine stalling or hesitation during acceleration.
How to Fix P067A 2016 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage in the Cylinder 4 Glow Plug Control Circuit using a diagnostic scanner.
- Inspect the glow plug in Cylinder 4 for any signs of damage or malfunction and replace if necessary.
- Check the wiring and connections in the glow plug control circuit for any issues such as corrosion or loose connections. Repair or replace as needed.
- Test the glow plug relay and ECM to ensure they are functioning correctly. Replace if found to be faulty.
- Clear the DTC and test the vehicle to ensure the issue has been resolved.
Cost to Fix P067A 2016 GMC Sierra
The cost of repairing a Cylinder 4 Glow Plug Control Circuit Low Voltage issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, replacing a glow plug can cost between $50 to $150 per plug, with the total repair cost potentially ranging from $150 to $400 including parts and labor. Additional costs may apply if other components such as the glow plug relay or ECM need to be replaced. It is advisable to consult with a professional mechanic for a more accurate cost estimate based on your vehicle's make and model.
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Frequently Asked Questions about P067A 2016 GMC Sierra Code
What does the OBDII code P067A mean for a 2016 GMC Sierra?
P067A indicates that the glow plug control circuit for cylinder 4 is experiencing low voltage, which may impact engine start performance in cold conditions.
What are the common symptoms of code P067A on a 2016 GMC Sierra?
Common symptoms include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and a possible illuminated check engine light.
What causes the P067A code on a 2016 GMC Sierra?
Causes may include a faulty glow plug, damaged wiring, poor electrical connections, or a malfunctioning glow plug control module.
How do I diagnose the P067A code on my 2016 GMC Sierra?
Start by inspecting the glow plug for cylinder 4, checking wiring and connectors for damage or corrosion, and testing the glow plug control module with a multimeter.
Can I drive my 2016 GMC Sierra with the P067A code active?
While the truck may still run, driving with this code active can lead to hard cold starts and potential damage to other components over time.
How do I fix the P067A code on a 2016 GMC Sierra?
Repairs may involve replacing the cylinder 4 glow plug, repairing or replacing damaged wiring/connectors, or replacing the glow plug control module if faulty.
How much does it cost to fix the P067A code on a 2016 GMC Sierra?
Repair costs vary depending on the specific issue, but glow plug replacement typically costs $100-$300, while control module replacement could cost $300-$600.
Can a failing glow plug cause engine damage on my 2016 GMC Sierra?
While a single failing glow plug typically won't cause significant damage, prolonged issues can lead to harder starts and strain other engine components.
How can I prevent the P067A code from occurring on my 2016 GMC Sierra?
Regular maintenance, including inspecting glow plugs and electrical connections, can help prevent this code from appearing.
Do I need a professional to fix the P067A code on my 2016 GMC Sierra?
If you're experienced with automotive repairs, you may be able to fix it yourself. However, complex electrical diagnostics may require professional assistance.
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