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Home >> Chevrolet >> 2006 >> Impala LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - DTC P0442 To DTC P2A01 >> DTC P2077 or P2078 >> Circuit/System Verification
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Circuit/System Verification

Command the IMT valve ON. The IMT Valve Command parameter should transition from open to closed and the IMT Valve Feedback parameter should transition from 20-22 percent to 77-80 percent.