P0679
Cylinder 9 Glow Plug Circuit/Open
P0679 is an OBD-II diagnostic trouble code meaning: Cylinder 9 Glow Plug Circuit/Open. Common causes: burnt out glow plug cylinder 9, broken power wire. Estimated repair cost: $22–67.
Symptoms
- Difficulty starting a multi-cylinder diesel engine in cold weather
- Check Engine Light
- White smoke on cold start
- Unstable engine operation after starting
- Glow plug indicator
Causes
- Burnt out glow plug cylinder 9
- Broken power wire
- Oxidation or damage to the connector
- GPCM module malfunction
- Wiring damage
How to Fix
- Read OBD-II error codes
- Measure the resistance of the spark plug of cylinder 9 (standard: 0.5–2 Ohm)
- Inspect the wiring and connector
- Check supply voltage
- Replace a faulty glow plug
- If the error occurs again - GPCM diagnostics
Related codes
Error P0679 by Vehicle Brand
FAQ
What does the P0679 code mean?
P0679 is an OBD-II diagnostic trouble code that indicates: Cylinder 9 Glow Plug Circuit/Open
What causes a P0679 error code?
The most common causes of P0679 include: Burnt out glow plug cylinder 9; Broken power wire; Oxidation or damage to the connector; GPCM module malfunction.
How do I fix a P0679 diagnostic trouble code?
To fix P0679: Read OBD-II error codes. Measure the resistance of the spark plug of cylinder 9 (standard: 0.5–2 Ohm). Inspect the wiring and connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0679?
Yes, but get it checked soon
How much does it cost to fix P0679?
The estimated repair cost for P0679 is $22–67. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat