Cylinder 3 Glow Plug Incorrect
The P06C7 code indicates that the glow plug in cylinder 3 is not functioning correctly, often due to a mismatch in resistance or a failure to reach the proper temperature. This can cause hard starting, misfires, and increased emissions in diesel engines. The glow plug control module monitors the current draw and resistance of each glow plug; when cylinder 3's values are out of specification, the code is set.
01. Most Common Causes
- Faulty glow plug in cylinder 3
- Open or shorted glow plug wiring
- Failed glow plug control module
- Corrosion or poor connection at the glow plug connector
02. Symptoms You Will Notice
- Hard starting, especially in cold weather
- Rough idle or misfire on cylinder 3
- Check Engine Light illuminated
- Excessive smoke from exhaust on startup
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Test glow plug resistance at the connector; compare to specification (typically 0.5-2 ohms).
Step 3: Inspect wiring and connectors for damage or corrosion.
Step 4: If wiring is good, replace the glow plug in cylinder 3.
Step 5: Clear codes and test drive to verify repair.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, as it can cause hard starting, misfires, and potential damage to the engine if left unaddressed.
How much does it cost to fix?▼
The cost to fix a P06C7 code typically ranges from $50 to $150, including parts and labor for replacing the glow plug.