LEMON Manuals: Even more car manuals for everyone: 1960-2025

Home >> Pontiac >> 2001 >> Firebird Formula, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 5.7L >> Diagnostic Tests >> DTC P1639: 5-Volt Reference 2 Circuit >> Notes

April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P1639: 5-Volt Reference 2 Circuit: Notes

NOTE: For circuit reference, see WIRING DIAGRAMS article.

scientia non olet · About LEMON Manuals