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Home >> Chevrolet >> 2006 >> Monte Carlo LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - DTC P0442 To DTC P2A01 >> DTC P0660 >> 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 15-30 percent to 70-90 percent.