P0672 GMC Code - Cylinder 2 Glow Plug Circuit Fault
Quick Answer
The P0672 GMC code indicates a fault in the glow plug circuit of cylinder 2 in a GMC vehicle. 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 GMC 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 GMC Description
The P0672 GMC code indicates a fault in the glow plug circuit of cylinder 2 in a GMC vehicle. 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 plug warms up to ensure proper ignition of the fuel-air mixture. If there is a fault in the glow plug circuit of cylinder 2, it can lead to difficulties starting the engine, reduced fuel efficiency, and increased emissions.
Common Causes of P0672 GMC
- 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 buildup on the glow plug terminals.
Symptoms of P0672 GMC
- Difficulties starting the engine, especially in cold weather.
- Rough idling or unstable engine operation.
- Reduced fuel efficiency.
- Increased emissions.
- Engine misfires.
How to Fix P0672 GMC
- Diagnose the specific cause of the fault by using a scan tool to read the code and testing the glow plug, wiring, and control module.
- Replace the faulty glow plug in cylinder 2 if it is found to be the root cause of the issue.
- Inspect and repair any damaged wiring or connectors in the glow plug circuit.
- Replace the glow plug control module if it is malfunctioning.
- Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0672 GMC
The typical repair costs for addressing a cylinder 2 glow plug circuit fault in a GMC vehicle can range from $150 to $300, 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 is advisable to check with local auto repair shops for a more accurate estimate based on your specific situation. Labor rates generally range from $80 to $150 per hour, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.
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Information for Specific GMC Models
- P0672 2014 GMC Sierra — Cylinder 2 Glow Plug Circuit Fault
- P0672 2015 GMC Sierra — Cylinder 2 Glow Plug Circuit Fault
- P0672 2016 GMC Sierra — Cylinder 2 Glow Plug Circuit Fault
- P0672 2017 GMC Sierra — Cylinder 2 Glow Plug Circuit Fault
- P0672 2018 GMC Sierra — Cylinder 2 Glow Plug Circuit Fault
Frequently Asked Questions about P0672 GMC Code
What does OBDII code P0672 mean on a GMC?
Code P0672 indicates a fault in the glow plug circuit for cylinder 2. The glow plug may not be heating properly, which can affect cold starts.
What are common symptoms of P0672 in a GMC?
Symptoms include hard starting in cold weather, rough idle, reduced engine performance, and an illuminated check engine light.
What causes the P0672 code on a GMC?
Causes may include a faulty glow plug, damaged glow plug wiring, a defective glow plug control module, or poor electrical connections in the circuit.
Can I drive my GMC with a P0672 code?
Driving with a P0672 code is generally safe in warm weather but may cause starting issues in cold temperatures. It's best to address the issue promptly.
How do I diagnose the P0672 code on a GMC?
Start by inspecting the glow plug for cylinder 2, checking for physical damage or corrosion. Test the glow plug with a multimeter and inspect the wiring and connections.
How do I fix the P0672 code on my GMC?
Repairs may include replacing the glow plug for cylinder 2, repairing damaged wiring, cleaning corroded connections, or replacing the glow plug control module if necessary.
How much does it cost to repair P0672 on a GMC?
The cost varies but typically ranges from $50 to $200 for parts and labor, depending on whether just the glow plug or additional components need replacement.
What tools are needed to fix the P0672 code?
Common tools include a multimeter for testing the glow plug, hand tools for removing and replacing parts, and possibly a scan tool to clear the code after repairs.
What happens if I ignore the P0672 code on my GMC?
Ignoring P0672 can lead to harder cold starts, increased fuel consumption, and potential damage to other components in the glow plug system over time.
Is P0672 specific to GMC vehicles?
No, P0672 is a generic OBDII code that applies to all diesel vehicles, but the exact repair steps may vary depending on the make and model.
Discuss the causes and fixes for P0672 GMC OBDII Code
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Glow plug - Removed and replaced one side, one. Today engine light back on.
Code P0672 GMC
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