DTC P0141: Heated Oxygen Sensor No. 2 - Heater Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Heated Oxygen Sensor (HO2S) No. 2 heater output voltage is too low when oxygen sensor heater is off, or HO2S No. 2 heater output voltage is too high when oxygen sensor heater is on. ECM continuously monitors this circuit. MIL is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- Open or short to ground in circuit between HO2S No. 1 and ECM.
- ECM malfunction.