LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Controls - Self-Diagnostics - 4.0L) >> Diagnostic Tests >> DTC P1133 & P1153: Ho2S Bank 1 & 2 Sensor 1 - Insufficient Switching >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step number in the diagnostic procedures.

  1. 2

    This step tests if other possible causes of this DTC have already been diagnosed.

  2. 3

    Diagnose other DTCs first because they may be the cause of this DTC setting.

  3. 4

    With the engine running warm and at fast idle, and with a coolant temperature of at least 185°F (85°C), the oxygen sensor voltage should rapidly swing above 0.625 mV and below 0.325 mV.

  4. 6

    This step tests if the oxygen sensor voltage is swinging between rich and lean very slowly, or not at all.

  5. 9

    This step tests for causes of oxygen sensor failure. If the sensor is replaced without finding the cause of contamination, premature failure of the new sensor may result.
scientia non olet · About LEMON Manuals