Arturg1292

Hey I have a 08 rx8 grand touring with 51k miles Recently my battery went bad and I had a CEL. I got the battery charged and the battery light and CEL was still on and it wasn't idleing normally so I changed the battery. When I did that the CEL went off so I figured it was from the bad battery but the battery light was still on I figured that would reset or something. Then when I turned it on again and recently the CEL went on again with the battery light still on. Before I get the CEL checked does any one know if maybe the new battery isn't giving enough crank power and causing the CEL. Because I just took the old battery to one of those battery stations that trade batteries for a small fee so I don't know what the specs on the battery is.

djfa

iTrader: (3)

Your alternator is probably crapping out. Its not charging your battery so youre having problems starting it. I dont think the ecu throws a code for the battery. It would have to be your alternator. Have you noticed if your power windows go up slower than normal?

Arturg1292

just a little, its more like when I put the windows up and its almost closed it kinda sounds like the motor is struggling the last inch to get it all the way up.

Arca_ex

iTrader: (10)

If the battery light is on it's most likely your alternator. If you take it to an Autozone or O'Reilly's most of them have a machine that can test alternator output while it's still in the car.

EDZRIDE

iTrader: (1)

+1 on that ^. Also have the battery load tested.

Hector Castillo

iTrader: (6)

+1..

Arturg1292

Hey guys I will take the car to autozone Tuesday, I am pretty sure you guys are right about the alternator because its idleing the same way as before with the old battery. It drops rpms for a second then picks it back up like it is not getting enough power to idle and this is a new battery.