DTC P0155, BMW Hex Code 0x2CA1, BMW Code 11425: O2 Sensor Heater Circuit (Bank 2 Sensor 1) (PLAUS): Subcomponent

Sensor ceramic temperature monitor detects reduced heater performance at oxygen sensor before cat. (no fault in heater wiring) during heating following engine start and period for registering operational status. Diagnosis conditions: - No overrun cutoff - Off at least 2 min. - No other O2 sensor faults