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DTC codes / P22xx · Fuel and air metering (injector circuits) / P2236

P2236O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 3)

P2236 means the engine computer has detected an electrical short between the signal wire and the heater wire inside the Bank 2 Sensor 3 oxygen sensor circuit. The computer monitors the sensor's signal voltage and heater current, and it flags this code when the two circuits show continuity or voltage patterns that should never occur together.

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.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage