marcel111 Posted August 26, 2023 Report Share Posted August 26, 2023 Hi, i got huge problem. Forscan shows me fault P1A10:00-AF. Hybrid battery 75%, new 12v battery. Car don't start. Can you help me? Quote Link to comment Share on other sites More sharing options...
homestead Posted August 26, 2023 Report Share Posted August 26, 2023 What voltage does the 12V battery show? If you just replaced the 12v battery maybe the real problem was it was not being charged by the high voltage battery. (DC-DC converter) Quote Link to comment Share on other sites More sharing options...
marcel111 Posted August 26, 2023 Author Report Share Posted August 26, 2023 (edited) New one shows 11,7V out of the car Old one was very old, 2019y Edited August 26, 2023 by marcel111 Quote Link to comment Share on other sites More sharing options...
homestead Posted August 27, 2023 Report Share Posted August 27, 2023 Should read about 12.5v or so. Try charging the 12v battery and see if the car will start. When the 12v battery was replaced did they reset the BMS? Quote Link to comment Share on other sites More sharing options...
djc Posted August 29, 2023 Report Share Posted August 29, 2023 My 2 year old 12v battery also reads 11.7 volts when key is off. That is plenty to pull-in the relay that lets the HVB begin recharging the 12v and also start the car. When you open the door instrument panel back light should come on. When key is to "on" (but not start) you should hear relay click behind you and 12v battery voltage should rise (mine goes to 12.5). Turning key to "start" should bring the 12volt circuit up to 14.3 or so volts. So how much of that happens for you? You might try disconnecting the 12v battery for a few minutes then reconnecting - sort of rebooting. Here is a write-up, apparently for Ford service centers, on the code you mention in 2016-17 Fusions. It appears to be connected with BECM, and appears to be a software problem (the remedy they mention is reprogramming the BECM). So maybe your new battery (or the installation process) triggered the code (which apparently also prevents starting the vehicle): https://ford.oemdtc.com/3140/no-crank-p1a10-diagnostic-trouble-code-dtc-2016-2017-ford-fusion Please let us know the resolution of your problem - there but for the grace of Ford go we. Quote Link to comment Share on other sites More sharing options...
Cwoods Posted January 3 Report Share Posted January 3 This code sets due to a fault in the hybrid system. This fault can be flagged in the Powertrain Control Module (PCM), When the hybrid battery pack is below normal. Find the Battery jump button located inside a panel on drivers side wall under dash. Press the button, wait 7-8 mins for light to flash green. Start the car and run until Hybrid battery pack is fully charged. Quote Link to comment Share on other sites More sharing options...
cr08 Posted January 3 Report Share Posted January 3 On 1/3/2024 at 3:23 PM, Cwoods said: This code sets due to a fault in the hybrid system. This fault can be flagged in the Powertrain Control Module (PCM), When the hybrid battery pack is below normal. Find the Battery jump button located inside a panel on drivers side wall under dash. Press the button, wait 7-8 mins for light to flash green. Start the car and run until Hybrid battery pack is fully charged. There is no HVB jump starting button in these vehicles. That only existed in the much older first gen Escape hybrids with the NIMH packs. This is dated info. Quote Link to comment Share on other sites More sharing options...
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