Error code
OBD2 P2234
OBD2P2234
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
moderateCan drive, but fuel efficiency may be affected.
Summary
P2234 indicates that there is an issue with the heated oxygen sensor (H028) on bank 2, specifically a short circuit in its signal wiring to the heater circuit.
Common Causes
- Wiring issues between H025 and ECM
- Faulty heated oxygen sensor
Fixes
- Replace the faulty heated oxygen sensor or repair wiring issues.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P2200NOx Sensor Circuit
- P2201NOx Sensor Circuit Range/Performance
- P2202NOx Sensor Circuit Low Input
- P2203NOx Sensor Circuit High Input
- P2204NOx Sensor Circuit Intermittent Input
- P2205NOx Sensor Heater Control Circuit/Open
- 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