P0673 2015 GMC Sierra Code - Cylinder 3 Glow Plug Circuit Fault
Quick Answer
The diagnostic trouble code P0673 for a 2015 GMC Sierra indicates a fault in the glow plug circuit of cylinder 3. Common causes include Faulty glow plug in cylinder 3, Damaged wiring or connectors in the glow plug 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
- P0673 2015 GMC Sierra indicates Cylinder 3 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty glow plug in cylinder 3, Damaged wiring or connectors in the glow plug 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 P0673 2015 GMC Sierra Description
The diagnostic trouble code P0673 for a 2015 GMC Sierra indicates a fault in the glow plug circuit of cylinder 3. Glow plugs are essential components in diesel engines that help with cold starts by heating the air in the combustion chamber. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel. In this case, a fault in the glow plug circuit of cylinder 3 means that there is an issue with the electrical system that controls the glow plug in that specific cylinder.
Common Causes of P0673 2015 GMC Sierra
- Faulty glow plug in cylinder 3.
- Damaged wiring or connectors in the glow plug circuit.
- Malfunctioning glow plug relay.
- Issues with the engine control module (ECM).
- Corrosion or poor connections in the glow plug circuit.
Symptoms of P0673 2015 GMC Sierra
- Difficulty starting the vehicle, especially in cold weather.
- Rough idling or misfires.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Engine performance issues, such as lack of power or acceleration.
How to Fix P0673 2015 GMC Sierra
- Begin by diagnosing the specific cause of the glow plug circuit fault using a diagnostic scanner to pinpoint the issue.
- Inspect the glow plug in cylinder 3 for any signs of damage or wear 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 to ensure it is functioning correctly, replacing it if it is faulty.
- Clear the diagnostic trouble code from the vehicle's ECM and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0673 2015 GMC Sierra
The typical repair costs for a glow plug circuit fault like P0673 can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing a glow plug can cost between $50 and $150 per plug, while diagnosing and repairing wiring or relay issues can add to the total cost. Overall, the repair for this code could range from $150 to $500, including parts and labor. It is advisable to check with local auto repair shops for more accurate estimates based on your vehicle make and model. Keep in mind that diagnostic time and labor rates can vary, so it's essential to get multiple quotes before proceeding with the repair.
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