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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo Extended, 6.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L (LLY) - DTC P0401 To DTC P2510 >> DTC P0402 >> Circuit/System Testing

Circuit/System Testing

IMPORTANT: Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.

Inspect the charge air cooler for leaks. Refer to Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test) or Charge Air Cooler Diagnosis (Full System Air Leak Test) .

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