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Home >> Chevrolet >> 2009 >> Chevy Express G2500, Van Cargo Extended, 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - DTC P1224 To DTC P2463 >> DTC P2228 or P2229 >> Circuit/System Testing

Circuit/System Testing

  1. Turn ON the ignition, with the engine OFF.
  2. Observe the BARO parameter with a scan tool.
  3. Compare the BARO parameter to the range specified in the altitude vs. barometric pressure table.
    • If the BARO parameter is outside the range specified, replace the ECM.
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