P0677
Cylinder 7 Glow Plug Circuit/Open
P0677 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Glow Plug Circuit/Open. Common causes: burnt out glow plug for cylinder 7, broken power wire. Estimated repair cost: $22–67.
Symptoms
- Difficulty starting a diesel engine at low temperatures
- Check Engine Light
- White smoke on cold start
- Unstable engine operation at idle
- The glow plug indicator is on
Causes
- Burnt out glow plug for cylinder 7
- 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 7 (standard: 0.5–2 Ohm)
- Inspect the wiring and spark plug connector
- Check supply voltage
- Replace a faulty glow plug
- If the error occurs again, check GPCM
Related codes
Error P0677 by Vehicle Brand
FAQ
What does the P0677 code mean?
P0677 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Glow Plug Circuit/Open
What causes a P0677 error code?
The most common causes of P0677 include: Burnt out glow plug for cylinder 7; Broken power wire; Oxidation or damage to the connector; GPCM module malfunction.
How do I fix a P0677 diagnostic trouble code?
To fix P0677: Read OBD-II error codes. Measure the resistance of the spark plug of cylinder 7 (standard: 0.5–2 Ohm). Inspect the wiring and spark plug connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0677?
Yes, but get it checked soon
How much does it cost to fix P0677?
The estimated repair cost for P0677 is $22–67. Actual cost depends on your vehicle, location, and labor rates.
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