J35A6

Advanced Diagnostics

DTC P0135: Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater Circuit Malfunction (Engine Type: J35A6)







General Description
A heater for the sensor element is embedded in the rear air/fuel ratio (A/F) sensor (bank 1, sensor 1), and it is controlled by the powertrain control module (PCM). It is activated and heats the sensor to stabilize and speed up the detection of oxygen content when the exhaust gas temperature is cold. The PCM monitors the rear A/F sensor heater output (return check). A malfunction is detected if the return signals do not meet the command value (for heater activation) in the PCM for a set time or more and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status







Enable Conditions







Malfunction Threshold
One of these conditions must be met for at least 2 seconds.

- No return signal HIGH is detected when the PCM output duty is less than 20 %.
- Return signal does not change when the PCM output duty is more than 20 % and less than 80 %.
- No return signal LOW is detected when the PCM output duty is more than 80 %.

Driving Pattern
Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle for at least 2 seconds.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs. The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.