What does code P2235 mean?

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2235

P2235O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 2)

P2235 means the engine computer has detected an electrical short between the signal wire and the heater wire inside the downstream oxygen sensor circuit on bank 2. The computer monitors the sensor's signal voltage and sees it behaving like the heater circuit, so it flags the fault and may default to a fixed value for that sensor.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.