battery needs to be changed

2002 BMW 325
35,000 MILES • 2.3L • 6 CYL • 2WD • MANUAL
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JOHN HOWBOWTIT
  • MEMBER
  • 1 POST
whats a mod $12 meaning in a obdII scan tool? was pressing odometer reset to get hidden tests then service light came on so I got scanner out & it said mod $12 and some misfire 300 code and in 1000 something code, i erased codes so I don't know exactly which numbers but mod12 for sure, all because battery needs to be changed.
Mar 23, 2017 at 8:37 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,658 POSTS
If the battery voltage is low it will cause all kinds of weird things to happen, I would change the battery and then clear the codes to see what happens.

Here is a guide to let you know what you are in for when changing the battery,

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Please let me know if you need anything else to get the problem fixed.

Best, Ken



Mar 27, 2017 at 9:12 AM
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