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DTC P0133: Primary Ho2S-1 Slow Response

NOTE: If DTCs P0131, P0132 and/or P0135 are present with DTC P0133, trouble shoot them before DTC P0133.
NOTE: DTC P0133 is set and MIL illuminated when deterioration of HO2S-1 has been detected during 2 consecutive trips.
  1. Clear Diagnostic Trouble Codes. See CLEARING DIAGNOSTIC TROUBLE CODES  . Start engine. Hold engine speed at 3000 RPM under no load condition with transaxle in Neutral or Park until radiator fan comes on. Allow engine to idle. Connect SCS Service Connector to 2-pin service check connector. See Figure . Test drive vehicle at 55 MPH with transaxle in D4 position (5th gear on M/T) until readiness code comes on.
  2. If DTC P0133 is not indicated, problem is intermittent. System is okay at this time. Check for poor connections or loose wires at 10-pin in-line connector located at right front shock tower, HO2S-1, ATTS (if equipped) and PCM connectors. See WIRING DIAGRAMS article. Repair as necessary. If DTC P0133 is indicated, replace primary HO2S-1.
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