CEL with AA catted

Erling · 10-06-2023, 10:44 AM

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Worked fine with no CEL first two days, now I have p0420 code, thoughts?

TanzaniteM340i · 10-06-2023, 10:53 AM

From what I've heard across the forum, the connections need to be checked because they can sometimes come loose from vibration/expansion (especially just after installation). Check the O2 sensor while you're at it.

Jnasratyar · 10-06-2023, 11:31 AM

Just contact AA and they will send you another.

whofelt · 10-06-2023, 01:12 PM

I've had mine on for 30,000 miles and no check engine light

mike@x-ph.com · 10-06-2023, 01:47 PM

Quote:

Originally Posted by Jnasratyar

Just contact AA and they will send you another.

+1

Ruebarb · 10-06-2023, 07:29 PM

Saw this pop up on the G42 forum last week, could be a break in issue as it also occured with a day or so, then went away for the G42 after another day. Call AA, they'll have the best advise.

WernerM340IX · 10-12-2023, 01:20 PM

Has the problem been solved in the meantime?

mike@x-ph.com · 10-12-2023, 02:27 PM

Quote:

Originally Posted by Ruebarb

Saw this pop up on the G42 forum last week, could be a break in issue as it also occured with a day or so, then went away for the G42 after another day. Call AA, they'll have the best advise.

its not uncommon for the CEL to pop when the downpipe is still new, once its cleared it should not come back.

If it does, AA will replace the downpipe

10-06-2023, 10:44 AM	#1
Erling New Member 2 Rep 13 Posts Drives: M340i Join Date: Sep 2023 Location: Austin iTrader: (0)	Featured on BIMMERPOST.com Worked fine with no CEL first two days, now I have p0420 code, thoughts? Attached Images
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10-06-2023, 10:53 AM	#2
TanzaniteM340i Greenhorn 2 Rep 6 Posts Drives: 2020 BMW M340i xDrive Join Date: Sep 2022 Location: Oyster Bay, NY iTrader: (0) Garage List 2020 M340i xDrive [0.00]	From what I've heard across the forum, the connections need to be checked because they can sometimes come loose from vibration/expansion (especially just after installation). Check the O2 sensor while you're at it.
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10-06-2023, 11:31 AM	#3
Jnasratyar Lieutenant 359 Rep 570 Posts Drives: 2023 BMW M340i Join Date: May 2022 Location: California iTrader: (0) Garage List 2023 BMW M340i [9.83]	Just contact AA and they will send you another.
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10-06-2023, 01:12 PM	#4
whofelt First Lieutenant 198 Rep 300 Posts Drives: M340ix Join Date: Jan 2022 Location: California iTrader: (0)	I've had mine on for 30,000 miles and no check engine light __________________ 2022 M340 Xdrive, aFe CAI, AA Catted Downpipe, 13mm wheel spacers. 41,000 miles on the odometer
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10-06-2023, 07:29 PM	#6
Ruebarb First Lieutenant 375 Rep 375 Posts Drives: BMW G42 M240i Join Date: Jan 2022 Location: MA iTrader: (0)	Saw this pop up on the G42 forum last week, could be a break in issue as it also occured with a day or so, then went away for the G42 after another day. Call AA, they'll have the best advise.
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10-12-2023, 01:20 PM	#7
WernerM340IX New Member 8 Rep 25 Posts Drives: G21 M340IX 2023 LCI Join Date: Aug 2023 Location: Belgium iTrader: (0)	Has the problem been solved in the meantime?
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