P0133

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.

1. Reset the ECM/PCM.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.
3. Test-drive under the following conditions:

- 55 mph (89 km/h) steady speed
- A/T and CVT in D position (M/T in 5th gear)
- Until readiness code or Temporary DTC P0133 comes on.

4. Check for a Temporary DTC with the HDS or a scan tool.

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 the ECM/PCM.