1996 Acura Integra GS-R, 2D CoupeFACTORY OEM SERVICE PROCEDURE

DTC P0133 - Primary (Front) Heated O2 Sensor Slow Response

NOTE: If DTCs P0131, P0132 and/or P0135 are also present, trouble shoot those DTCs before DTC P0133.
  1. Start engine. Raise and hold engine speed at 3000 RPM with transmission gear selector in Park or Neutral until radiator fan comes on. Let engine 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 indicated, replace front HO2S (sensor No. 1). If DTC P0133 is not indicated, system is functioning properly at this time. Failure is intermittent. Check for poor connections or loose wires at HO2S (sensor No. 1) and PCM connectors. See WIRING DIAGRAMS  section. Repair as necessary.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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