Error code
OBD2 P0674
OBD2P0674
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cylinder 4 Glow Plug Circuit.
Severity
moderateCan drive, but may experience difficulty starting the engine in cold conditions.
Summary
P0674 indicates an issue with the glow plug circuit for cylinder 4 in diesel engines.
Common Causes
- Defective glow plug
- Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors in the glow plug control circuit
- Defective glow plug timer or relay on older systems
- Defective glow plug control module
- Failed or failing PCM (rare)
Fixes
- Replace faulty glow plug or wiring/connectors.
FAQ
What does P0674 mean?
P0674 indicates a malfunction in the circuitry of the glow plug for cylinder 4, which is crucial for starting diesel engines in cold conditions.
How do I fix P0674?
Fixing P0674 typically involves replacing the faulty glow plug or repairing damaged wiring/connectors. Consult a mechanic to diagnose and replace the specific part causing the issue.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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