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2009 Cadillac Escalade Hybrid – No Crank With P0AC4 U1888 U1875 U1878

Aug 15
1 min read

Updated: Aug 15

CUSTOMER CONCERN

Customer states the vehicle will not crank. DTCs P0AC4, U1888, U1875 and U1878 are stored.

CAUSE

DLC resistance, fuse-feed and expansion-bus testing isolated an open or high-resistance circuit in the drive-motor generator power-inverter module wiring.

CORRECTION

Repair drive-motor generator power-inverter module wiring and connector terminals. Clear network and hybrid DTCs and verify module communication and normal cranking.

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2009 Cadillac Escalade Hybrid – No Crank With P0AC4 U1888 U1875 U1878

CUSTOMER CONCERN

CAUSE

CORRECTION

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