P0672 2018 GMC Sierra Code - Cylinder 2 Glow Plug Circuit Fault
Quick Answer
The diagnostic trouble code P0672 for a 2018 GMC Sierra indicates a fault in the glow plug circuit of cylinder 2. Common causes include Faulty glow plug in cylinder 2, Damaged wiring or connectors in the glow plug 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
- P0672 2018 GMC Sierra indicates Cylinder 2 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty glow plug in cylinder 2, Damaged wiring or connectors in the glow plug 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.
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Code P0672 2018 GMC Sierra Description
The diagnostic trouble code P0672 for a 2018 GMC Sierra indicates a fault in the glow plug circuit of cylinder 2. Glow plugs are essential components in diesel engines that help with cold starts by heating the combustion chamber before ignition. When the engine is cold, the glow plug circuit sends an electrical current to the glow plugs to heat them up, aiding in the combustion process.
Common Causes of P0672 2018 GMC Sierra
- Faulty glow plug in cylinder 2.
- Damaged wiring or connectors in the glow plug circuit.
- Malfunctioning glow plug control module.
- Issues with the engine control module (ECM).
- Corrosion or poor electrical connections in the circuit.
Symptoms of P0672 2018 GMC Sierra
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Increased emissions.
- Illumination of the check engine light on the dashboard.
How to Fix P0672 2018 GMC Sierra
- Begin by diagnosing the specific cause of the fault code using a diagnostic scanner to pinpoint the issue.
- Inspect the glow plug in cylinder 2 to determine if it is functioning properly.
- Check the wiring and connectors in the glow plug circuit for any damage or corrosion.
- Test the glow plug control module and the engine control module for proper operation.
- Replace any faulty components, such as the glow plug, wiring, connectors, or control modules, as needed.
Cost to Fix P0672 2018 GMC Sierra
The typical repair costs for addressing a cylinder 2 glow plug circuit fault in a 2018 GMC Sierra can range from $150 to $500, depending on the extent of the issue and the cost of parts and labor. It's important to note that 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. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, while independent shops may charge less. For a more precise estimate, it's advisable to check local rates before proceeding with the repair.
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