F10 M5 Car running rich even after reinstalling stock downpipes

lasd000 · 12-01-2023, 05:46 PM

Hello everyone,

I purchased my 2012 M5 a year ago with catless downpipes and, as far as I know, no tune. Recently, I replaced them with catted OEM downpipes.

Despite cleaning the intake system and sensors, I'm still getting "running rich on both banks" error codes (118011 and 118111).

These codes were present with the catless downpipes, but there was no check engine light or drivetrain malfunction alerts. So it has me wondering if it has some kind of tune and how can I be flash ot back to stock ( I have access to ISTA+ can it do it?)

The car has not been driven much lately since these changes were made in a shop, maybe it needs to complete a few droving cycles to adapt to the new dps?
Any insights or suggestions would be appreciated, running out of ideas here.

lasd000 · 12-02-2023, 05:41 AM

Update: Apparently car has a tune to prevent CEL, does anyone knows if its possible to have the dmes tuned back to stock with ISTA+?

Thank you in advance

KurtsM5 · Today, 04:20 AM

Sorry, I was in the same situation when I bought mine. I took it to a very good shop in Atlanta (Solo Motorsports in Lawrenceville) and they said it has to have a tune because no CEL but couldn't determine what it was. So I had them flash it back to stock(CEL) and then after I got moved to FL I flashed a BM3 stage 2 93 octane OTS in it. It's been great ever since. If I were you I'd buy Bootmod3 and the flash pack, flash it to stock, then tune it with one of their OTS maps if you're computer savvy enough to do it. Otherwise take it to a shop that can do the above procedure.

No, I don't think ISTA P can flash DMEs.

12-01-2023, 05:46 PM	#1
lasd000 Registered 0 Rep 3 Posts Drives: BMW M5 2012 (F10) Join Date: Oct 2022 Location: Lima, Peru iTrader: (0)	F10 M5 Car running rich even after reinstalling stock downpipes Hello everyone, I purchased my 2012 M5 a year ago with catless downpipes and, as far as I know, no tune. Recently, I replaced them with catted OEM downpipes. Despite cleaning the intake system and sensors, I'm still getting "running rich on both banks" error codes (118011 and 118111). These codes were present with the catless downpipes, but there was no check engine light or drivetrain malfunction alerts. So it has me wondering if it has some kind of tune and how can I be flash ot back to stock ( I have access to ISTA+ can it do it?) The car has not been driven much lately since these changes were made in a shop, maybe it needs to complete a few droving cycles to adapt to the new dps? Any insights or suggestions would be appreciated, running out of ideas here.
	Appreciate 0 Tweet Quote

12-02-2023, 05:41 AM	#2
lasd000 Registered 0 Rep 3 Posts Drives: BMW M5 2012 (F10) Join Date: Oct 2022 Location: Lima, Peru iTrader: (0)	Update: Apparently car has a tune to prevent CEL, does anyone knows if its possible to have the dmes tuned back to stock with ISTA+? Thank you in advance
	Appreciate 0 Quote

Today, 04:20 AM	#3
KurtsM5 Private 23 Rep 65 Posts Drives: 2013 w/ DPs, BM3 stage 2 Join Date: Sep 2022 Location: Tampa Bay area Florida iTrader: (0)	Sorry, I was in the same situation when I bought mine. I took it to a very good shop in Atlanta (Solo Motorsports in Lawrenceville) and they said it has to have a tune because no CEL but couldn't determine what it was. So I had them flash it back to stock(CEL) and then after I got moved to FL I flashed a BM3 stage 2 93 octane OTS in it. It's been great ever since. If I were you I'd buy Bootmod3 and the flash pack, flash it to stock, then tune it with one of their OTS maps if you're computer savvy enough to do it. Otherwise take it to a shop that can do the above procedure. No, I don't think ISTA P can flash DMEs.
	Appreciate 0 Quote