P0682 Code - Cylinder 12 Glow Plug Circuit Fault
Quick Answer
The diagnostic trouble code P0682 indicates a fault in the cylinder 12 glow plug circuit. Common causes include Faulty glow plug in cylinder 12, Wiring or connection issues 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
- P0682 indicates Cylinder 12 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty glow plug in cylinder 12, Wiring or connection issues 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 P0682 Description
The diagnostic trouble code P0682 indicates a fault in the cylinder 12 glow plug circuit. Glow plugs are essential components in diesel engines that help heat the combustion chamber during cold starts. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel-air mixture. A malfunction in the glow plug circuit can lead to difficulties starting the engine, reduced performance, increased emissions, and potential long-term damage to the engine.
Common Causes of P0682
- Faulty glow plug in cylinder 12.
- Wiring or connection issues in the glow plug circuit.
- Defective glow plug relay.
- Faulty engine control module (ECM) or powertrain control module (PCM).
- Corrosion or damage to the electrical connections.
Symptoms of P0682
- Hard starting or extended cranking time.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Increased emissions.
How to Fix P0682
- Diagnose the specific issue by using a scan tool to pinpoint the exact cause of the fault.
- Inspect the glow plug in cylinder 12 for proper operation and replace if necessary.
- Check the wiring and connections 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 faulty.
- Clear the trouble code from the ECM/PCM memory and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0682
The cost of repairing a cylinder 12 glow plug circuit fault can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while the labor costs can be between $100 and $300. Overall, the total repair cost can be around $150 to $500. It's important to note that these are rough estimates, and actual costs may differ based on various factors such as location, vehicle make and model, and the labor rates of the auto repair shop. It's recommended to obtain quotes from different shops to find the best price for the repair.
When is the Code Detected?
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Code P0682 Information for Specific Makes
- P0682 Ford — Cylinder 12 Glow Plug Circuit Fault
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