DTC P0133: Primary HO2S (Sensor 1) Slow Response
NOTE:
If DTC P0131, P0132 and/or P0135 are stored at the same time as DTC P0133, troubleshoot those DTCs first, then recheck for DTC P0133.
- Reset the PCM (see HOW TO RESET THE PCM ).
- Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.
- Test-drive under the following conditions:
- 55 mph (89 km/h) steady speed
- Transmission in D position
- Until readiness code or Temporary DTC P0133 comes on
- Check for a Temporary DTC with the scan tool or the HDS.
Is Temporary DTC P0133 indicated?
- YES -Replace the primary HO2S (Sensor 1).
- NO -Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the primary HO2S (Sensor 1) and at the PCM.