What does code P2236 mean?

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.