I have a P0A7F code which is a battery issue

If you have 117,000 miles on the car, i'm going to say you have exceeded the 100,000 miles limit.

 

I think you may have better luck posting in the Gen II forums.

 

A service bulletin tells the mechanic how to do a service, it is not a recall. It would not matter how long a mechanic has known how to fix a P0A7F, you did not have one until now.

 

DTC P0A7F "Hybrid Battery Pack Deterioration"

Either the internal module resistance is above spec or the SOC from one module to the next is larger than it should be. In either case, you are probably going to need a new traction battery although there is some possibility that the battery ECU has failed instead.

I am not aware that a TSB exists regarding this. If you should find this to be the case please post the # (and ideally a .pdf copy, if you can get hold of one.)

Since your car is out of warranty an alternative if you can DIY is to replace the battery with one purchased from a salvage yard. You may be able to buy one for ~$500 plus shipping, check eBay Motors. 2G salvage batteries are fairly inexpensive since most 2G are still under the hybrid system warranty. Good luck.

 

First of all, how did you read this code? Do you have, or have access to, a scan tool that can delve into the HV battery ECU and tell you the internal resistance of every module? {Can Scangauge do this? Or just Techstream and AutoEnginuity?) P0a7f is related to either high internal resistance of a module pair or poor capacity of a module pair. Reference range for internal resistance is 0.01 to 0.1 ohm. Your dealer will be able to read the internal resistances for all module pairs, although it is quite possible that no one in the service department will have ever seen this code and know what to do other than to follow the diagnostic flow chart and suggest that you buy a "new" traction battery for $2588 + labor.

Also, is it possible that your 12V battery is dying and this is just one of those quirky things that happens? This particular code is NOT a fail safe (limp-in) code, meaning that you have a MIL warning but operation is not affected. So it is always worth clearing the code a few times to see if it keeps coming back.

If you have to replace your battery, there are loads and loads of them in junkyards, for about $400, and by finding a fresh one you might be able to drop it right in. There are a few hybrid garages in Colorado and you might try calling them as well.

 

Im having thw same issue .is there any worked around to resolve this

 

you could test the individual cells and replace the bad ones.

 

If you decide to take the battery pack apart, check the individual cell connections for corrosion. If they are corroded, take the screws off and clean each one of them EDIT(and the connection strips) and reassemble and try it. This has been known to solve the problem with some battery packs. If there is no corrosions, then you either have to check each cells voltage and find the low voltage
cells and replace them, or get another battery pack. If you get another battery pack, you can get one that has been rebuilt, for less than a new one. I know there is a Hybrid shop in Sri Lanka. You'll have to search for it, as I lost it's location. Wish I could help further. EDIT: If you do the job yourself, be sure to look on youtube for a video of how to do it, there are many. Also, clean the fan, and ducts.