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2012 Chevrolet Volt – No Start or Electric Propulsion With P0A0C
CUSTOMER CONCERN The vehicle will not start or move under electric power after transmission work and stores DTCs P0A0C and P1E00. CAUSE The power-inverter-module cable cover did not complete the high-voltage interlock circuit because it was missing, damaged, or incorrectly seated. CORRECTION Remove and replace the power-inverter-module cable cover, seat the high-voltage interlock connector correctly, clear P0A0C and P1E00, and verify Ready mode and propulsion.
2012 Chevrolet Volt – Service High Voltage Charging System With P1FFD and P1FFF
CUSTOMER CONCERN The Service High Voltage Charging System message is displayed with DTCs P1FFD and P1FFF. CAUSE Graphing the battery coolant-level-sensor circuit showed intermittent voltage spikes to 5 volts instead of the normal 3.5 volts, confirming a sensor-harness fault. CORRECTION Remove and replace the drive-motor battery coolant-level sensor harness, program the HPCM2 and BECM updates supported by the repair, clear P1FFD and P1FFF, and verify charging-system operation.
2012 Chevrolet Volt – Check-Engine Light After Collision Repair With P1E00 and P0C4A
CUSTOMER CONCERN The check-engine light remains on after collision repairs with DTCs P1E00 and P0C4A. CAUSE Air trapped in the high-voltage battery cooling circuit prevented proper coolant-pump flow and set the cooling-system fault. CORRECTION Refill and bleed the high-voltage battery cooling system with the Vac-N-Fill procedure, repeat thermal cycles as required, clear the DTCs, and verify coolant-pump operation.
2012 Chevrolet Volt – High-Voltage Battery Will Not Charge With P0D26
CUSTOMER CONCERN The high-voltage battery will not charge and DTCs P0D26, P0CD2, and P1E00 are stored. CAUSE The confirmed repair identified the X98 hybrid/EV battery charger receptacle as failed. CORRECTION Remove and replace the X98 hybrid/EV battery charger receptacle, clear P0D26, P0CD2, and P1E00, and verify plug-in charging operation.
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