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Home >> Pontiac >> 2002 >> Firebird Base, 2D Coupe, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1639: 5-Volt Reference 2 Circuit >> Notes
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DTC P1639: 5-Volt Reference 2 Circuit: Notes

NOTE: To locate components, see COMPONENT LOCATIONS . For circuit reference, see WIRING DIAGRAMS article. For connector terminal identification, see CONNECTOR IDENTIFICATION .