High AFR/ CEL

JayM6 · 07-27-2018, 11:41 PM

Hey guys, have a 2015 CP M6. Car has 20,000 miles, and runs and performs great but recently had a CEL come on. I scanned it and go a p0175 code: system too rich bank 2. I cleared the code and it hasn't came on since but I haven't driven it much. Car is stock besides turner exhaust and is running a BMS intake which has been running great for past month, so I'm not sure if this is related. Obviously hoping to keep the intake for the sound and looks, hoping it's not the culprit. Is this something I should be concerned about even if the CEL doesn't come back on? Any insight guys?

Craze · 07-28-2018, 12:49 AM

Mods?

JayM6 · 07-28-2018, 10:23 AM

I cleaned MAF's, reinstalled BMS intake, and disconnected battery for about 30 mins to restart ECU but light is still there

Craze · 07-28-2018, 04:57 PM

Its the intakes

JayM6 · 07-28-2018, 06:51 PM

I drove the car and the light came back on. What about the intakes would Be causing this? Someone said can be possible o2 sensor issues

Craze · 07-29-2018, 01:40 AM

Cheap intakes often have these sorts of issues
Im not that familiar with these particular ones

How long have they been on the car?

Pikey Motorsports · 07-29-2018, 12:29 PM

I had this issue once with intake cleared codes has never came back since

WickedBMW · 07-29-2018, 02:17 PM

I had BMS intake with zero issues.

JayM6 · 07-30-2018, 11:07 AM

I put stock intakes back on, cleared the light but it's back on again..still showing both banks are showing rich. My long term fuel trims are both hovering around -15, but short term are around 0.8. Any ideas what can be causing this??

Craze · 07-31-2018, 06:10 AM

Are bms oil type filters?

AWF10M5 · 07-31-2018, 10:35 AM

MAFS need to be replaced. Had the same issue with the same intakes.

JayM6 · 07-31-2018, 05:14 PM

Quote:

Originally Posted by AWF10M5

MAFS need to be replaced. Had the same issue with the same intakes.

Did you replace them and keep the intakes or get rid of them?

07-27-2018, 11:41 PM	#1
JayM6 Private First Class 33 Rep 142 Posts Drives: 15 M6 GC Comp Join Date: Jul 2013 Location: Bay Area, California iTrader: (0)	Intake and Check engine light Hey guys, have a 2015 CP M6. Car has 20,000 miles, and runs and performs great but recently had a CEL come on. I scanned it and go a p0175 code: system too rich bank 2. I cleared the code and it hasn't came on since but I haven't driven it much. Car is stock besides turner exhaust and is running a BMS intake which has been running great for past month, so I'm not sure if this is related. Obviously hoping to keep the intake for the sound and looks, hoping it's not the culprit. Is this something I should be concerned about even if the CEL doesn't come back on? Any insight guys?
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07-28-2018, 12:49 AM	#2
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	Mods?
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07-28-2018, 10:23 AM	#3
JayM6 Private First Class 33 Rep 142 Posts Drives: 15 M6 GC Comp Join Date: Jul 2013 Location: Bay Area, California iTrader: (0)	I cleaned MAF's, reinstalled BMS intake, and disconnected battery for about 30 mins to restart ECU but light is still there Last edited by JayM6; 07-31-2018 at 06:17 PM..
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07-28-2018, 04:57 PM	#4
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	Its the intakes
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07-28-2018, 06:51 PM	#5
JayM6 Private First Class 33 Rep 142 Posts Drives: 15 M6 GC Comp Join Date: Jul 2013 Location: Bay Area, California iTrader: (0)	I drove the car and the light came back on. What about the intakes would Be causing this? Someone said can be possible o2 sensor issues
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07-29-2018, 01:40 AM	#6
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	Cheap intakes often have these sorts of issues Im not that familiar with these particular ones How long have they been on the car?
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07-29-2018, 12:29 PM	#7
Pikey Motorsports Lieutenant 139 Rep 420 Posts Drives: M5 Join Date: Apr 2018 Location: Bristol iTrader: (0)	I had this issue once with intake cleared codes has never came back since
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07-29-2018, 02:17 PM	#8
WickedBMW Major 613 Rep 1,124 Posts Drives: 2021 BMW M3 MT Join Date: Sep 2014 Location: BIMMERPOST.com iTrader: (5)	I had BMS intake with zero issues. __________________ ?When you have fast cars and bad luck, it's a lot easier to handle than having slow cars and bad luck.? Kevin Harvick
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07-30-2018, 11:07 AM	#9
JayM6 Private First Class 33 Rep 142 Posts Drives: 15 M6 GC Comp Join Date: Jul 2013 Location: Bay Area, California iTrader: (0)	I put stock intakes back on, cleared the light but it's back on again..still showing both banks are showing rich. My long term fuel trims are both hovering around -15, but short term are around 0.8. Any ideas what can be causing this?? Last edited by JayM6; 07-31-2018 at 06:18 PM..
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07-31-2018, 06:10 AM	#10
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	Are bms oil type filters?
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07-31-2018, 10:35 AM	#11
AWF10M5 Banned 223 Rep 553 Posts Drives: f10 m5 Join Date: Dec 2016 Location: Bikini bottom iTrader: (7)	MAFS need to be replaced. Had the same issue with the same intakes.
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