How to code a battery on OBD11

Mar 10, 2025
15
0
Depends on what fault codes you have please share what codes you have.
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tracktoy

Active Member
Jun 11, 2023
693
534
Not one I have any experience in but I would not have thought a battery replacement would cure this.

i saw this article (granted for Audi) but a lot of the web pages talk about wiring / sensor issues.

Hopefully somebody who know these codes can confirm
 
Mar 10, 2025
15
0
Not one I have any experience in but I would not have thought a battery replacement would cure this.

i saw this article (granted for Audi) but a lot of the web pages talk about wiring / sensor issues.

Hopefully somebody who know these codes can confirm
Because I have replaced the battery but do I need to code it for the faults to now go away
 

tracktoy

Active Member
Jun 11, 2023
693
534
Yes I would always code in a new battery, this tells the charging system you have a new battery and therefore charges (over time) differently.

With regards to the serial number all that is important is that it is one character different to the current one so just add 1 to the number you allready have and it will be fine.

As per my previous post I dont know this issue but suspect that once you have coded and tried to clear the errors they will come back as there is a wiring problem and a new battery wont help, but hopefully somebody who has dealt with this issue before can confirm.
 
Mar 10, 2025
15
0
Yes I would always code in a new battery, this tells the charging system you have a new battery and therefore charges (over time) differently.

With regards to the serial number all that is important is that it is one character different to the current one so just add 1 to the number you allready have and it will be fine.

As per my previous post I dont know this issue but suspect that once you have coded and tried to clear the errors they will come back as there is a wiring problem and a new battery wont help, but hopefully somebody who has dealt with this issue before can confirm.
Okay because I’ve had it coded and the faults are still showing up so at this point it’s got to be a wiring issue
 

cairus

Active Member
Jun 4, 2024
1,076
373
Even if the battery were incorrectly coded, it would be the smallest problem. 98% of the time, the error has nothing to do with the battery.
 
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