Error code
OBD2 P0204
OBD2P0204
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Injector Circuit/Open - Cylinder 4.
Severity
highDrive cautiously and seek repair immediately to avoid further engine damage.
Summary
P0204 indicates an issue with the fuel injector circuit for cylinder 4 in your vehicle's engine.
Symptoms
- Engine misfire
- Engine stalls
- Cranking but not starting
Common Causes
- Failed fuel injector
- Faulty wiring or connector in the injector circuit
- Problem with the Powertrain Control Module (PCM)
Diagnosis
- Perform a visual inspection of the fuel injectors and connections.
- Check for misfires using a scan tool.
- Use a noid light to test the control circuit to the injector.
- Test power supply to the injector with a test light.
- Verify continuity between PCM and injector using a multimeter.
Fixes
- Replace faulty fuel injector or repair wiring issues
FAQ
What does P0204 mean?
P0204 indicates a malfunction in the fourth cylinder's fuel injector circuit.
How do I diagnose P0204?
Use diagnostic tools like a scan tool and noid light to check for misfires, power supply issues, and wiring continuity.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0200Injector Circuit/Open
- P0201Injector Circuit/Open - Cylinder 1
- P0202Injector Circuit/Open - Cylinder 2
- P0203Injector Circuit/Open - Cylinder 3
- P0205Injector Circuit/Open - Cylinder 5
- P0206Injector Circuit/Open - Cylinder 6
- P0207Injector Circuit/Open - Cylinder 7
- P0208Injector Circuit/Open - Cylinder 8
- P0209Injector Circuit/Open - Cylinder 9
- P0210Injector Circuit/Open - Cylinder 10
- P0211Injector Circuit/Open - Cylinder 11
- P0212Injector Circuit/Open - Cylinder 12