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Home >> Pontiac >> 2009 >> Vibe GT, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 2.4L (Lax) - DTC P0443 To DTC P2A00 >> DTC P2237-P2239 >> Circuit/System Verification

Circuit/System Verification

  1. Engine running at normal operating temperature, observe the scan tool HO2S 1 voltage parameter. The reading should fluctuate between 3.2-3.4 volts.
  2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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