OBD System Description - HO2S Heater Monitor

OBD System Description - HO2S Heater Monitor

System Description / Monitoring Procedure

For both primary and secondary HO2S heaters, the system monitors proper current and loaded voltage. The HO2S heaters are monitored once per driving cycle during monitoring conditions.

DTC Description / Detecting Condition / Confirmation Procedure

P0135

Refer to P0135 DTC P0135: Heated Oxygen Sensor (HO2S) Heater Circuit Malfunction (Bank-1 Sensor-1).

P0141

Refer to P0141 DTC P0141: Heated Oxygen Sensor (HO2S) Heater Circuit Malfunction (Bank-1 Sensor-2).

Primary HO2S Heater Monitor

Operation





Enable condition





Typical malfunction thresholds






Secondary HO2S Heater Monitor

Operation





Enable condition





Typical malfunction thresholds






MODE $06 Data