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Home >> Cadillac >> 2009 >> CTS V, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L - DTC P0641 To DTC P2635 >> DTC P2228 or P2229 >> Circuit/System Verification

Circuit/System Verification

  1. Verify that the following DTCs are not set: P0641 or P0651.
  2. Ignition ON, observe the BARO parameter with a scan tool. The BARO parameter should be within the range specified in the altitude vs. barometric pressure table. Refer to Altitude Versus Barometric Pressure .
  3. 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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