Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Isuzu >> 1999 >> Oasis >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Tests >> Circuit Tests >> DTC P0133 - Primary Ho2S-1 Sensor Slow Response

DTC P0133 - Primary Ho2S-1 Sensor Slow Response

NOTE: If DTCs P0131, P0132 and/or P0135 exist with P0133, trouble shoot DTC P0133 last.
  1. Perform PCM reset procedure. See TESTS W/CODES - INTRODUCTION article. Connect OBD-II scan tool. Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Allow engine to idle. Connect SCS Service Connector (07PAZ-0010100). Test drive vehicle at 55 MPH, with transmission in D4 position (A/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 HO2S-1 and PCM connectors. See WIRING DIAGRAMS article. Repair as necessary. If DTC P0133 is indicated, replace HO2S-1.
scientia non olet · About Mike's Workshop Manuals