Error code
OBD2 P2231
OBD2P2231
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Signal Circuit Shorted to Heater Circuit.
Severity
moderateYou can continue driving, but it's recommended to address this issue soon as it may affect fuel efficiency and emissions.
Summary
Code P2231 indicates that there is an issue with the heated oxygen sensor (H028) on bank 1 of your engine, specifically that its signal circuit has shorted to the heater circuit and it's not sending a proper signal.
Common Causes
- Failed or damaged oxygen sensor
- Wiring issues between the oxygen sensor and ECM
- PCM (Engine Control Module) malfunction
Fixes
- Replace the oxygen sensor or repair damaged wiring.
FAQ
What should I do if my car has code P2231?
Check and replace the faulty oxygen sensor or inspect and fix any damaged wiring. If issues persist, consider reprogramming your PCM.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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- P2206NOx Sensor Heater Control Circuit Low
- P2207NOx Sensor Heater Control Circuit High
- P2208NOx Sensor Heater Sense Circuit
- P2209NOx Sensor Heater Sense Circuit Range/Performance
- P2210NOx Sensor Heater Sense Circuit Low Input
- P2211NOx Sensor Heater Sense Circuit High Input