Code No. P0134: Linear A/F Sensor Circuit No Activity Detected




OPERATION


The linear A/F sensor and the engine-ECU are connected by the following 3 lines to detect the air-fuel ratio.


FUNCTION




TROUBLE JUDGEMENT


Check Conditions
Judgement Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check harness between linear A/F sensor connector terminal and engine-ECU connector terminal LSFL, LEFL.



  • Check output line for open circuit and damage.

Q. Is the check result normal?

Go to Step 2.
Repair or replace the connector, or repair the damaged harness wire.

STEP 2. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code stored?

Replace the linear A/F sensor.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).