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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1866 (Engine Controls And Fuel - 2.2L (L61) - DTC P0700 To DTC P2A01) >> DTC P2A01 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. The ECM detects that the HO2S 2 did not transition below 300 mV and above 725 mV during the passive test.
  2. One of the following tests fail:
    • The lean intrusive test
      • The ECM detects that the HO2S 2 is more than 300 mV for 12 seconds.
      • The HO2S 1 is less than 300 mV.

        OR

    • The rich intrusive test
      • The ECM detects that the HO2S 2 is less than 725 mV for 12 seconds.
      • The HO2S 1 is more than 600 mV.

DTC P2A01 sets within 60 seconds when the above conditions are met.

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