LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 1997 >> Oasis LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> DTC P0133: Front Ho2S-1 Slow Response
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0133: Front Ho2S-1 Slow Response

NOTE: If DTCs P0131, P0132 and/or P0135 are present with P0133, trouble shoot those DTCs before DTC P0133.
  1. Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DTCS  . 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) or 5th gear (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 HO2S-1 and PCM connectors. See the WIRING DIAGRAMS article. Repair as necessary. If DTC P0133 is indicated, replace front HO2S-1.
scientia non olet · About LEMON Manuals