Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Subaru Outback Base, Standard TransFACTORY OEM SERVICE PROCEDURE
DTC P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): DTC Detecting Condition
- Detected when two consecutive driving cycles with fault occur.
- GENERAL DESCRIPTION Refer to DTC P0133 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1) DTC P0133 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Refer to
, OPERATION , Clear Memory Mode and Inspection Mode Refer to
, PROCEDURE , Inspection Mode.
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK EXHAUST SYSTEM.
NOTE:
Check the following items.
|
Is there any fault in exhaust system? | Repair the exhaust system. | Replace the front oxygen (A/F) sensor. Refer to FRONT OXYGEN (A/F) SENSOR Front Oxygen (A/F) Sensor. |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.