[EricErac]

Hello, need help please …
I just installed a downpipe (pre-cats delete) on my M2 Competition 2019 with opf
I have a miltek equal length but I still have the opf and the cats in place
I flashed stage 1 and selected aftermarket downpipe before going to the workshop
When returning back to home I got an error message.
I went to the workshop this morning and they told me to select OPF delete and to flash again.
I did it and indeed no error anymore.

But I get afraid when I discover the answer of MHD, see hereby :
no sir this is very dangerous! if the OPF is installed you should NEVER EVER deactivate the OPF function.
a Regenration is required when the OPF gets filled up, if the DME does not do that regen then you could blow up your engine!

DME active codes from MHD
1A280A - Filtre à particules essence, capteur de pression, flexible : non étanche. (Gasoline particulate filter, pressure sensor, hose pipe: Not leaktight.)
1A2814 - Filtre à particules essence, capteur de pression 2, flexible : non étanche. (Gasoline particulate filter, pressure sensor 2, hose pipe: Not leaktight.)

[mike@x-ph.com]

Not familiar with MHD, but please let us know of any updates on this issue

[squixs]

Since you have a OPF car, I assume you live in the EU, like myself.

It sounds like you’ve installed aftermarket downpipes that do not have support for the OPF pressure sensors.

There should be a pitot tube like thing on every downpipe if it had OPF support.
Example: https://www.tij-power.com/product_in...ucts_id=655158

A possible fix would indeed be to turn the OPF monitor off, but this is dangerous as mentioned since you’ll lose the automatic regeneration.

Two options:
- change to downpipe with OPF pressure sensor support
- remove OPF.

[EricErac]

Yes, I'm in EU with OPF
They installed VRSF downpipes, is it possible that it's not compatible for EC cars with OPF ?

[shahano]

you should take ur car to an exhausting place and they can clear all the OPF without changing your exhaust, they just remove all the filters inside the OPF and it just becomes an empty part of the exhaust.

But definitely, you should remove the OPF before going catless DP, if they are catted given some problems with heat and restrictions.
You should not use the OPF delete option if you still have the OPF, it could definitely cause fire.

[Info@mad-us.com]

I think someone makes an opf version of the downpipes.