P0133

DTC P0133 - FRONT OXYGEN (A/F) SENSOR CIRCUIT SLOW RESPONSE

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How To Clear Diagnostic trouble Codes.




WIRING DIAGRAM

11O1: CHECK ANY OTHER DTC ON DISPLAY.

CHECK: Does the Subaru Select Monitor or OBD-II general scan tool indicate DTC P1130, P1131, P1132 or P1133?

YES: Inspect DIG P1130, P1131, P1132 or P1133 using "11. Diagnostics Chart with Trouble Code for 2500 cc Models".

NOTE: In this case, it is not necessary to inspect DTC P0133.

NO: Go to step 11O2.

11O2: CHECK EXHAUST SYSTEM.

NOTE: Check the following items.
- Loose installation of front portion of exhaust pipe onto cylinder heads.
- Loose connection between front exhaust pipe and front catalytic converter
- Damage of exhaust pipe resulting in a hole.

CHECK: Is there a fault in exhaust system?

YES: Repair exhaust system.

NO: Replace front oxygen (A/F) sensor.