DTC codes / P2Axx · Hybrid propulsion / P2AF0
P2AF0 indicates that the powertrain control module has detected an abnormally low negative current on the intake air oxygen sensor control circuit for bank 2. This sensor is a wideband air-fuel ratio sensor mounted before the catalytic converter, and the code means the circuit is not allowing the sensor's pump cell to draw the negative current the PCM commands.
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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