Error code
OBD2 P0673
OBD2P0673
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cylinder 3 Glow Plug Circuit.
Severity
moderateCan drive, but starting issues may occur especially when cold
Summary
P0673 indicates an issue with the glow plug circuit for cylinder 3 in diesel engines. This code is set when there's a malfunction or open circuit detected by the PCM.
Symptoms
- Engine difficulty starting, especially in cold weather
- Check engine light illuminated
Common Causes
- Defective glow plug on cylinder 3
- Damaged wiring or connectors in the glow plug control circuit
- Faulty relay or timer for older systems
- Failed glow plug control module
- Corroded or disconnected glow plug lead
Diagnosis
- Inspect wiring and connectors in the glow plug circuit for cylinder 3
- Check for corrosion or damage on the glow plug itself and its connections
- Test relay/timer if applicable
Fixes
- Replace faulty glow plug, damaged wiring/connectors, or control module as needed
FAQ
Can I drive with P0673?
Yes, but starting issues may occur especially in cold weather
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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