09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
#1
09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
This 09 Escape Hybrid only has 90k miles. The battery works fine however the wrench light is on caused by DTC P0AA7 which means Voltage Isolation Sensor Circuit error. Factory manual says replace the battery but I'm trying to save it. Any solution? Thanks in advance!
#2
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
i have only had a hybrid for 3 months (so i am not the best qualified) however off the internet:
"The high voltage system uses a battery voltage isolation sensor inside the battery control module to monitor separation of the high and low voltage systems.
If sensor fails, P0AA7 will set. The high voltage system may become disabled."
i had the battery control module out about a month or so ago - it is behind the relay.
the top plate screws are easy but there are 2 on each side that are very close to the interior side panels;
they are a pain.
i have a write-up on one of my posts of lifting each side of the battery and supporting with small blocks of wood.
i dont know where one would get a BCM though.
"The high voltage system uses a battery voltage isolation sensor inside the battery control module to monitor separation of the high and low voltage systems.
If sensor fails, P0AA7 will set. The high voltage system may become disabled."
i had the battery control module out about a month or so ago - it is behind the relay.
the top plate screws are easy but there are 2 on each side that are very close to the interior side panels;
they are a pain.
i have a write-up on one of my posts of lifting each side of the battery and supporting with small blocks of wood.
i dont know where one would get a BCM though.
#3
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
#4
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
i have only had a hybrid for 3 months (so i am not the best qualified) however off the internet:
"The high voltage system uses a battery voltage isolation sensor inside the battery control module to monitor separation of the high and low voltage systems.
If sensor fails, P0AA7 will set. The high voltage system may become disabled."
i had the battery control module out about a month or so ago - it is behind the relay.
the top plate screws are easy but there are 2 on each side that are very close to the interior side panels;
they are a pain.
i have a write-up on one of my posts of lifting each side of the battery and supporting with small blocks of wood.
i dont know where one would get a BCM though.
"The high voltage system uses a battery voltage isolation sensor inside the battery control module to monitor separation of the high and low voltage systems.
If sensor fails, P0AA7 will set. The high voltage system may become disabled."
i had the battery control module out about a month or so ago - it is behind the relay.
the top plate screws are easy but there are 2 on each side that are very close to the interior side panels;
they are a pain.
i have a write-up on one of my posts of lifting each side of the battery and supporting with small blocks of wood.
i dont know where one would get a BCM though.
#7
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
Just an update. I replaced the battery with an used battery bought from a junk yard and the P0AA7 disappeared. Now have different issues to deal with
#9
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
well to follow up what Hippo has posted: Thanks for the info.
but that brings up a couple of questions:
1) what instrument did you use to ascertain that the hybrid battery that you bought was a good battery? scanguage or just voltage meter
2) dont know if you want to reveal: How much did it cost?
but that brings up a couple of questions:
1) what instrument did you use to ascertain that the hybrid battery that you bought was a good battery? scanguage or just voltage meter
2) dont know if you want to reveal: How much did it cost?
#10
Re: 09 Escape Hybrid has a P0AA7 Voltage Isolation Sensor Circuit
well to follow up what Hippo has posted: Thanks for the info.
but that brings up a couple of questions:
1) what instrument did you use to ascertain that the hybrid battery that you bought was a good battery? scanguage or just voltage meter
2) dont know if you want to reveal: How much did it cost?
but that brings up a couple of questions:
1) what instrument did you use to ascertain that the hybrid battery that you bought was a good battery? scanguage or just voltage meter
2) dont know if you want to reveal: How much did it cost?