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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

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  #1  
Old 08-27-2012, 08:48 AM
msbc9090 msbc9090 is offline
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Location: worcester
 
Join Date: Aug 2012
Posts: 1
Mein Auto: highway
01 750iL - Code P1461

2001 750iL E38 Code P1461
Converter?control module or battery?
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  #2  
Old 01-24-2015, 03:40 PM
Jodel Jodel is offline
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Location: Queens
 
Join Date: Jan 2015
Posts: 7
Mein Auto: 2000 750IL
2000 750IL code P1461

Hello All! This is my first post. Wondering if anyone found the solution to this error? New Batteries already put in but low voltage to Cat bank 1 "P1461" still causing Check Engine Light. BMW couldn't find the issue.
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  #3  
Old 01-26-2015, 09:41 PM
Jodel Jodel is offline
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Location: Queens
 
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Mein Auto: 2000 750IL
Hey guys, Any one with experience with this on out there?
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  #4  
Old 01-27-2015, 12:12 PM
u.nanimous u.nanimous is offline
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Location: SE Michigan
 
Join Date: Oct 2014
Posts: 1,737
Mein Auto: 1999 740iS, 2001 330xi
You said new "batteries" so you replaced both? How long ago?

A quick google search and:
http://www.bimmerforums.com/forum/sh...rom-750-Owners

"New" batteries are hopefully charged enough to start the car, but are usually not fully charged since they have been sitting around a while before you install them, perhaps you have a charging issue.

No personal experience so I could be wrong, but that thread looks good.
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  #5  
Old 01-27-2015, 07:26 PM
Jodel Jodel is offline
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Location: Queens
 
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Mein Auto: 2000 750IL
Thanks for the input. I saw that thread too but the charge is good. Both batteries were replaced this month.
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  #6  
Old 03-10-2016, 02:51 PM
Jodel Jodel is offline
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Location: Queens
 
Join Date: Jan 2015
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Mein Auto: 2000 750IL
This seem to be a tough one.....Anyone out there? I have the same issue for months but can't find a straight answer even from my Indi mechanic...Help!!
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  #7  
Old 03-10-2016, 04:34 PM
u.nanimous u.nanimous is offline
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Location: SE Michigan
 
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Mein Auto: 1999 740iS, 2001 330xi
Wow, going on 14 months and still no reply...have you verified the wiring or replaced anything since?
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  #8  
Old 03-11-2016, 09:04 AM
chrisn7 chrisn7 is offline
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Location: Huddersfield, West Yorks
 
Join Date: Oct 2011
Posts: 652
Mein Auto: 750iL
There was some confusion with that thread above. The bottom larger battery starts the car, and upper 'systems' battery is smaller, and drives everything else.

Perhaps you have a problem with the battery switch on the side of the upper battery. This basically controls charging of both batteries, always giving preference to the starter battery.

Sound like the system battery has low voltage - might have been replaced, but is it getting charged ie is the switch working as it should?
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  #9  
Old 03-11-2016, 10:50 AM
Jodel Jodel is offline
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Location: Queens
 
Join Date: Jan 2015
Posts: 7
Mein Auto: 2000 750IL
Batteries both check out. I'm on the east coast, once the weather warms up the check engine light goes away. Temps drop, it's back.
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