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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Controls And Fuel - 4.6L - DTC P0016 To DTC P0341) >> DTC P0068 or P0121 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. If DTCs P0101, P0106, or P0120 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
  2. Ignition ON, observe the scan tool MAP sensor parameter. The MAP sensor parameter should be within the range specified for your altitude. Determine the altitude at your current location and refer to Altitude Versus Barometric Pressure .
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