DTC Advanced Diagnostics: P0135
DTC P0135:Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater Circuit Malfunction (Engine Type: J35Y1, J35Y2)

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 (bank 1, sensor 1) heater output (return check). If the return signals do not meet the command value (for heater activation) for a set time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
5 seconds or more
DTC Type
Two drive cycles, MIL on
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
Battery voltage [BATTERY]
9.0 V
–
State of the engine
Running
Other
During rear A/F sensor (bank 1, sensor 1) heater operation
[ ]: HDS Parameter

Malfunction Threshold
One of these conditions is met for at least 5 seconds.
No return signal "HIGH" is detected when the PCM output duty is less than 5 %.
Return signal does not change when the PCM output duty is 5 %* or more.

*: PCM output duty is limited to 95 % when it exceeds 95 %.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Rear A/F sensor (bank 1, sensor 1) failure
Rear A/F sensor (bank 1, sensor 1) AFHT B1 line open
Rear A/F sensor (bank 1, sensor 1) AFHT B1 line short to ground
Rear A/F sensor (bank 1, sensor 1) power supply line open

Confirmation Procedure
Operating Condition
Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.