| 09-18-2021, 03:49 AM | #1 |
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2020 M4 ECU map catless downpipe
has anybody had a seccess in mapping 2020 M4 Competition (Heritage Eidition)?
I've installed catless downpipe with FI exhaust system, and check engine light came on, related to downpipe. I know the only way to delete this warning light is with ECU mapping, but at the moment MHD does not support for 2020 models. Is there a way to disable check engine light without mapping? Or is mapping the only way to disable it? If so, what other app (or mapping program) can I map the car with? BM3? JB4?? thanks  |
| 09-19-2021, 02:03 AM | #3 |
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you can try the macht schnell valve controller
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| 09-19-2021, 08:44 AM | #4 |
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You need to send out your ECU for a bench unlock first then you can load any tune you want.
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| 09-19-2021, 02:00 PM | #5 |
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Try this for the short term and see if it works, worth a try for CEL.
https://f80.bimmerpost.com/forums/sh....php?t=1667211
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