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Battery Light

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  #1 (permalink)  
Old 24 Dec 2017, 07:01 pm
Fresh Cruiser
Join Date: Jan 2016
Posts: 4
Default Battery Light

Bear with me as I give you all the information I have.

I have an 06 touring edition with 152k miles

Note I have had to jump my car a couple times.

I've replaced both terminals due to corision.

Battery randomly comes on. Sometimes five minutes down the road sometimes twenty minutes. Sometimes not at all.

Sometimes code p063a pops up. But not always.

Taken to auto zone/advanced all check and say the battery and the alternator are good.

Placed a multimeter on them. Measures 12.4 (after charged no idea when it was dead) and between 13.5 - 14.5 when running. Sometimes it fluxes while running but not always.

When turning over I have clocked it in at 10.3, 10.1, and 9.8 this is all not having been charged since the first one.

I took back to autozone. They ran a drain test while running. Hit .69mA came up suspect. And would flux. Was never high enough to constantly be "suspect".

Disconnected the battery negative and ran a particular drain test. Radio gave fluctuation on the meter. Would start at .15 and settle at .0007
Pulled both my aftermarket rad and amp fuses finally settled at .0004

Drove the car and the check battery light still flicked on. About two minutes down the road.

I don't think it's a pcm since that shouldn't stop my car from charging and dying.

Maybe it's still a bad alternator? Battery?

Any thoughts would be helpful in diagnosis this.


Last edited by Jer0560; 25 Dec 2017 at 08:52 am. Reason: Added car info.
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  #2 (permalink)  
Old 25 Dec 2017, 12:19 am
Senior Cruiser
Join Date: Nov 2010
Location: oak creek, wi
Posts: 1,149
Default Re: Battery Light

What year? What mileage? N/A or GT?

To help you diagnose we need this information.
2005 Toyota Camry LE Salsa Red (Wife's)
2002 Automatic N/A (Mine) Inferno Red
2016 Kia Soul Plus Black
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  #3 (permalink)  
Old 25 Dec 2017, 02:50 am
Obsessed Cruiser
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,454
Default Re: Battery Light

P063A - Generator Voltage Sensor Circuit

Possible causes:

1. Faulty Alternator
2. Alternator harness is open or shorted
3, Alternator circuit poor electrical connection
4. Faulty Powertrain Control Module (PCM)

Some members have had this problem and it turned out to be bad battery cables. Check to make sure your battery cable connectors are making good contact and that the battery cables are good.

What is your battery voltage when your engine is at 2,000 rpm?
If at First You Don't Succeed - Try, Try Again
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  #4 (permalink)  
Old 25 Dec 2017, 08:53 am
Fresh Cruiser
Join Date: Jan 2016
Posts: 4
Default Re: Battery Light

I apologize slipped my mind. Updated 06 touring edition with 152k miles.
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  #5 (permalink)  
Old 25 Dec 2017, 03:25 pm
Veteran Cruiser
Join Date: Aug 2015
Location: Lake Wales, FL
Posts: 4,931
Default Re: Battery Light

Check the ground wires and connectors on the driver side fender. This can be a problem area.

Aspire to inspire before you expire.
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