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02-17-2018, 08:29 AM | #1 |
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Error Codes - Help Needed Pls
Hi everyone,
So few days ago my 2008 e92 m3 just threw the engine light with Increased Emissions message on my idrive. Scanned the codes and I got the following: 1. 2789 - Catalytic Converter Conversion Bank 1 2. 278A - Catalytic Converter Conversion Bank 2 3. 27B0 - Secondary Air Flow System Flow Rate Bank 1 Anyone had experience or knowledge about these codes? I have been using a Megan Racing axleback for 2 years now and have never replaced or touched my original Cats but I didn't think the Cats would die? Could there be an exhaust or gasket leak? Any help is greatly appreciated! |
02-17-2018, 12:14 PM | #2 | |
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Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP
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Location: Atlanta, Ga
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Quote:
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02-18-2018, 08:50 AM | #3 |
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Wouldn’t there be at least an error code that would mention an O2 sensor if it was? I remember when I had to change an O2 sensor last year the code specifically said which O2 sensor too
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02-18-2018, 02:09 PM | #4 |
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Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP
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Or your cats have gone bad?
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02-22-2018, 12:07 PM | #5 |
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No one else had this set of codes pop up before? I'm wondering if it would be the sensors on the cat or the air flow sensor or if the cat is actually gone bad? (car has 86.5K miles never tracked)
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02-22-2018, 12:35 PM | #6 |
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A check engine light is likely caused by 1 code and not 3. I would clear all codes and as soon as the light comes on check to see what it is. That code converted to a P code is P0420. I have changed the cats in many cars for that code and they have never come back. It's a cat Efficiency DTC.
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02-25-2018, 09:32 PM | #7 |
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definitely sounds like O2 sensors to me.
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03-07-2018, 02:22 AM | #9 |
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I just got the same fault codes. Have you changed your cats, O2 sensors or the air flow sensor?
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03-07-2018, 07:17 AM | #10 |
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