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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 250 (Engine Controls Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P1133: Ho2S Insufficient Switching - Sensor 1 >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The number below refer to the step number on the diagnostic procedure.

  1. 2  - When the system is operating correctly, the HO2S 1 voltage should toggle at greater than and less than the specified values. You may need to operate the vehicle within the Freeze Frame conditions and Conditions for Setting the DTC to duplicate the malfunction that was detected by the PCM.
  2. 4  - The specified value is what is measured on a correctly operating system.
  3. 5  - The specified value is what is measured on a correctly operating system.

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