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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Check engine light

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      01-03-2021, 09:57 PM   #1
rrfitness20
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Check engine light

My check engine light just turned on. Engine oil level ok. No strange noises, no leaks, car still runs strong. What could it possibly be ?
Currently have JB+
AA Catted downpipe (which shouldn't cause a CEL)
And Dinan exhaust
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      01-03-2021, 11:00 PM   #2
enkoo52
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Quote:
Originally Posted by rrfitness20 View Post
My check engine light just turned on. Engine oil level ok. No strange noises, no leaks, car still runs strong. What could it possibly be ?
Currently have JB+
AA Catted downpipe (which shouldn't cause a CEL)
And Dinan exhaust
Run the code using bimmerlink app. I can help you if the app isn't tied to my vehicle vin. I also have a different obdlink app if bimmerlink don't work.

I had the check engine light come on a couple weeks back, Vehicle performance was unaffected, and nothing on the dash or touchscreen gave any additional information on what it could be. The code description when i ran it using bimmerlink showed Crankcase ventilation system: leakage detected.

Took it to BMW and they looked for a leaking gasket or seal and found nothing and cleared the code, hasn't come back since.
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      01-03-2021, 11:11 PM   #3
rrfitness20
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I've never linked that app before to my Vin. Is it easy to work?
And hopefully it's nothing bad
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      01-03-2021, 11:39 PM   #4
enkoo52
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Quote:
Originally Posted by rrfitness20 View Post
I've never linked that app before to my Vin. Is it easy to work?
And hopefully it's nothing bad
Yes, its easy. Just plug in OBDLinkMX+ or similar device to vehicle obd port by lower driver leg area. Make sure your phone is in airplane mode and connect to the device using Bluetooth and run the bimmerlink app.
Full access to the app is a one time fee of around 30$.
I can help you if we're still meeting up in the coming week to check out that dinan exhaust... or you can just text/message me and I'll try to walk you through it
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      01-04-2021, 02:09 AM   #5
hayko_M340
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Quote:
Originally Posted by rrfitness20 View Post
My check engine light just turned on. Engine oil level ok. No strange noises, no leaks, car still runs strong. What could it possibly be ?
Currently have JB+
AA Catted downpipe (which shouldn't cause a CEL)
And Dinan exhaust
I guarantee you it's from the AA catted downpipe. It's a higher flowing downpipe which easily could cause a cel. Shouldn't be anything major.
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      01-04-2021, 03:14 AM   #6
rrfitness20
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If it is because of the downpipe will that void my warranty
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      01-04-2021, 03:23 AM   #7
enkoo52
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Originally Posted by rrfitness20 View Post
If it is because of the downpipe will that void my warranty
Run the code first before you get too concerned about warranty but in short, if the issue is caused by the aftermarket part then bmw won't cover the repair.

I was also worried when this happened to me, because most people attribute check engine light to downpipe because that's what they're familiar with on other models. Unlikely it's your AA dp, but only way to find out is to check the code.
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      01-04-2021, 09:38 AM   #8
rrfitness20
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Have any of you ever been flagged and declined warranty ?
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      01-16-2021, 03:11 PM   #9
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You do a modification to exhaust which is connected to engine, and your car is prolly remmaped in the world of BMW you dont have warranty on your engine and gearbox anymore. Thats why I'm not tunning my m340 .
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      02-05-2021, 08:36 PM   #10
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If they Guarantee no CEL do you get your money back ?
saved myself $350 bucks going with this catted pipe and no CEL, but i have a small J-style spacer. 2k miles plus and no CEL
https://www.logosengineeringmotorwor...ra-2020-z4-g29
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      04-21-2021, 01:20 AM   #11
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Quote:
Originally Posted by rrfitness20 View Post
My check engine light just turned on. Engine oil level ok. No strange noises, no leaks, car still runs strong. What could it possibly be ?
Currently have JB+
AA Catted downpipe (which shouldn't cause a CEL)
And Dinan exhaust

Did you manage to sort this issue in the end ?
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      04-21-2021, 06:43 PM   #12
rrfitness20
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Kind of. I'm guessing it was related to my downpipe. I removed the JB+ ran it with no issues. After some time it came back on and went away on its own. No performance change so I'm guessing it wasn't anything alarming
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      05-29-2021, 05:23 PM   #13
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Quote:
Originally Posted by rrfitness20 View Post
Kind of. I'm guessing it was related to my downpipe. I removed the JB+ ran it with no issues. After some time it came back on and went away on its own. No performance change so I'm guessing it wasn't anything alarming
My check engine light just came on. I have the Racechip gts black. I have nothing popping up on dash or on screen. Just the light. Did you put back the jb or no. Wondering if I should disconnect it
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      05-31-2021, 09:13 AM   #14
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Quote:
Originally Posted by rrfitness20 View Post
My check engine light just turned on. Engine oil level ok. No strange noises, no leaks, car still runs strong. What could it possibly be ?
Currently have JB+
AA Catted downpipe (which shouldn't cause a CEL)
And Dinan exhaust
How long before the check engine light turned on ? Did it appear after installing the JB+ or just the downpipe itself ?

I've been running AA catted downpipe for 5K km with no issues at all...so i'm just wondering.
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      06-03-2021, 12:02 PM   #15
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It's interesting actually. I had both of them paired at the same time. Removed JB and about two weeks later CEL came back on with DP only. So I figured I'd just throw it back on. It's random. I currently have JB and downpipe and it will throw a cel randomly then come off
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      08-16-2021, 02:57 PM   #16
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Quote:
Originally Posted by rrfitness20 View Post
It's interesting actually. I had both of them paired at the same time. Removed JB and about two weeks later CEL came back on with DP only. So I figured I'd just throw it back on. It's random. I currently have JB and downpipe and it will throw a cel randomly then come off
pm me if wish turn off CEL errors
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