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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls & Fuel - 3.8L - DTC P0601 To U0107) >> DTC P2228 or P2229 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: If DTC P0641 or P0651 are set, diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  1. Ignition ON, observe the BARO parameter with a scan tool.
  2. Compare the BARO value to the range specified in the altitude vs. barometric pressure table.