Battery light on

1999 LEXUS RX 300
185,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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KF6PTS
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I was just driving my car and the battery light came on. I got my code reader and connected and it reads the following code P0765.
Any help on this?
What does the engine light has to do with P0765?
Do I need to change the transmission fluid?
Change the soleinod D?
Change the transmission?
What about the battery problem?
The alternator was change about a year ago.

Jul 10, 2016 at 5:44 AM
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HMAC300
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first have battery checked for condition including load test. it may be a belt problem as recommended replacement for belt and tensioner is 60,000 miles. all the shift solenoids are on the valve body and a transmission professional should do this as it may be something else like a failed part clutch. check fluid if you can if dark brown or black have a transmission professional look at this as it may need a rebuild. if battery in bad shape it can set a false code however.
Jul 10, 2016 at 8:31 AM