Cylinder 11 Glow Plug Incorrect
The P06CF code indicates that the glow plug for cylinder 11 is not operating correctly. Glow plugs are used in diesel engines to heat the combustion chamber for cold starts. An incorrect glow plug can cause hard starting, misfires, and increased emissions. This code is typically triggered when the glow plug resistance is out of specification or the circuit is faulty.
1. Most Common Causes
- Faulty glow plug in cylinder 11
- Open or shorted glow plug circuit
- Failed glow plug relay or control module
- Corrosion or damage at the glow plug connector
2. Symptoms You Will Notice
- Hard starting, especially in cold weather
- Engine misfire or rough idle
- Check Engine Light illuminated
- Reduced fuel economy
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the glow plug and wiring for cylinder 11 for damage or corrosion.
Step 3: Measure the resistance of the glow plug; compare to manufacturer specs (typically 0.5-2 ohms).
Step 4: Test the glow plug circuit for voltage and ground integrity.
Step 5: Replace the glow plug if faulty, and clear the code.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances, but hard starting and misfires may worsen. It's best to repair promptly to avoid further issues.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.