P0674
Cylinder 4 Glow Plug Circuit/Open
P0674 is an OBD-II diagnostic trouble code meaning: Cylinder 4 Glow Plug Circuit/Open. Common causes: burnt out glow plug cylinder 4, broken or damaged power cord. Estimated repair cost: $17–44.
Symptoms
- Difficulty starting a diesel engine in cold weather
- Check Engine Light
- White smoke on cold start
- Unstable engine operation after starting
- Glow plug indicator on the dashboard
Causes
- Burnt out glow plug cylinder 4
- Broken or damaged power cord
- Oxidation or poor contact in the connector
- GPCM module malfunction
- Damage to the wiring in the power circuit
How to Fix
- Read OBD-II error codes
- Measure the resistance of the glow plug of cylinder 4 (standard: 0.5–2 Ohm)
- Inspect the wiring and spark plug connector
- Check the voltage at the spark plug terminal
- Replace a faulty glow plug
- If the error occurs again - diagnostics of the GPCM module
Related codes
Error P0674 by Vehicle Brand
FAQ
What does the P0674 code mean?
P0674 is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Glow Plug Circuit/Open
What causes a P0674 error code?
The most common causes of P0674 include: Burnt out glow plug cylinder 4; Broken or damaged power cord; Oxidation or poor contact in the connector; GPCM module malfunction.
How do I fix a P0674 diagnostic trouble code?
To fix P0674: Read OBD-II error codes. Measure the resistance of the glow plug of cylinder 4 (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 P0674?
Yes, but get it checked soon
How much does it cost to fix P0674?
The estimated repair cost for P0674 is $17–44. Actual cost depends on your vehicle, location, and labor rates.
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