P0671 2015 GMC Sierra Code - Cylinder 1 Glow Plug Circuit Fault
Quick Answer
The diagnostic trouble code P0671 for a 2015 GMC Sierra indicates a fault in the glow plug circuit of cylinder 1. Common causes include Faulty glow plug in cylinder 1, Damaged wiring or connectors in the glow plug circuit, Defective 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
- P0671 2015 GMC Sierra indicates Cylinder 1 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty glow plug in cylinder 1, Damaged wiring or connectors in the glow plug circuit, Defective 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 P0671 2015 GMC Sierra Description
The diagnostic trouble code P0671 for a 2015 GMC Sierra indicates a fault in the glow plug circuit of cylinder 1. Glow plugs are essential components in diesel engines that help with cold starting by heating the combustion chamber before ignition. When the engine is cold, the glow plugs heat up to ensure proper combustion and smooth engine operation.
Common Causes of P0671 2015 GMC Sierra
- Faulty glow plug in cylinder 1
- Damaged wiring or connectors in the glow plug circuit
- Defective glow plug relay
- Issues with the engine control module (ECM)
- Corrosion or poor connections in the electrical system
Symptoms of P0671 2015 GMC Sierra
- Hard starting or extended cranking time
- Rough idle or misfires
- Decreased fuel efficiency
- Illumination of the check engine light
- Increased exhaust emissions
How to Fix P0671 2015 GMC Sierra
- Begin by diagnosing the specific cause of the glow plug circuit fault using a diagnostic scanner to pinpoint the exact issue.
- Inspect the glow plug in cylinder 1 for proper operation and replace if necessary.
- Check the wiring and connectors in the glow plug circuit for any damage or corrosion, repairing or replacing as needed.
- Test the glow plug relay and replace it if found to be defective.
- Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0671 2015 GMC Sierra
The cost of repairing a cylinder 1 glow plug circuit fault in a 2015 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a glow plug can range from $50 to $150 per plug, while the cost of a glow plug relay can range from $50 to $200. Labor costs can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair. Overall, you can expect to pay anywhere from $200 to $600 for parts and labor to address this issue. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle specifics.
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