Ford Repair Questions? Ask a Mechanic for Answers ASAP
The vehicles computer system will sense a low engine battery and start the engine. Extended idle will not drain the battery. Th3 computers will start the engine when either battery, the engine or the Hybrid battery is getting low. If the engine battery is shorted or drained, the engine will not start nor the vehicle will not start. Plugging the vehicle in will only charge the Hybrid battery and not the engine battery which is mounted in the rear of the vehicle under the rear package tray on the passenger side. Have the engine battery tested and/or replaced.