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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Tune question with aftermarket parts



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      08-31-2022, 11:12 AM   #1
Slim415
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Tune question with aftermarket parts

If I put the car back to a stock map with all my aftermarket parts, will it throw any codes? I know it's an odd sounding question, but will the DME sensors show readiness?

I have intake, bov, catless downpipes, charge pipe, 1 step colder plugs and FMIC.
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      08-31-2022, 11:42 AM   #2
lookalikehuuh
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Your catless DPs will never allow your car to set all the monitors and pass smog.

If you reinstalled your factory DPs the rest of the parts should be fine for smog/readiness monitors to work without an issue.
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      08-31-2022, 12:17 PM   #3
whyzee125
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Yes, the downpipes will throw a code. Everything else will be fine, like he said ^
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      08-31-2022, 12:43 PM   #4
Slim415
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Quote:
Originally Posted by lookalikehuuh View Post
Your catless DPs will never allow your car to set all the monitors and pass smog.

If you reinstalled your factory DPs the rest of the parts should be fine for smog/readiness monitors to work without an issue.
Thanks for the info. I should have known this already. I'm embarrassed for asking such a dumb question lol. I have a connection to pass smog for the visual inspection. And he said as long as I can get the DME to pass it would be fine.
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