DTC Troubleshooting: P0133 (61-1)

DTC P0133 (61-1):  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 (min-1) with no load (in Park or neutral) until the radiator fan comes on.

3.Test-drive under the following conditions:
  • 89 km/h (55 mph) steady speed
  • A/T 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 scan tool.

Is Temporary DTC P0133 indicated?

YES - Replace the  primary HO2S (Sensor 1).n

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the  primary HO2S (Sensor 1) and the  ECM/ PCM.n