DTC codes / P22xx · Fuel and air metering (injector circuits) / P2235
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.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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