P067B 2015 GMC Sierra Code - Cylinder 4 Glow Plug Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P067B for a 2015 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 4, specifically detecting high voltage. Common causes include Faulty glow plug in cylinder 4, Damaged wiring harness, 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
- P067B 2015 GMC Sierra indicates Cylinder 4 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 4, Damaged wiring harness, 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 P067B 2015 GMC Sierra Description
The diagnostic trouble code P067B for a 2015 GMC Sierra indicates an issue with the glow plug control circuit in cylinder 4, specifically detecting high voltage. Glow plugs are essential components in diesel engines, responsible for heating the air in the combustion chamber to facilitate cold starts. When the control circuit for the glow plug in cylinder 4 registers high voltage, it suggests an electrical malfunction that can impact the engine's performance.
Common Causes of P067B 2015 GMC Sierra
- Faulty glow plug in cylinder 4
- Damaged wiring harness
- Malfunctioning glow plug control module
- Poor electrical connections
- Corrosion or debris affecting the circuit
Symptoms of P067B 2015 GMC Sierra
- Check Engine Light illuminated
- Hard starting, especially in cold weather
- Rough idling or misfiring
- Reduced engine power
- Increased emissions
How to Fix P067B 2015 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the glow plug control circuit using a diagnostic scanner.
- Inspect the glow plug in cylinder 4 for proper operation and replace it if necessary.
- Check the wiring harness for any damage or corrosion, repairing or replacing as needed.
- Test the glow plug control module for functionality and replace if it is found to be faulty.
- Ensure all electrical connections are secure and free of debris, cleaning or repairing as required.
Cost to Fix P067B 2015 GMC Sierra
The typical repair costs for addressing a cylinder 4 glow plug control circuit high voltage issue in a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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