will cel limit power?

greywolf · 07-31-2016, 02:46 PM

If i get catless dp's and not turn off the cel will that limit the power or will the cel just be on and not effect the performance at all.

13M5F10 · 07-31-2016, 02:55 PM

CEL will stay on. Power is not affected

MCarsFan · 07-31-2016, 10:11 PM

I couldn't live with it. Seeing that big orange engine light would driver me nuts.

BPMSport · 07-31-2016, 11:52 PM

Quote:

Originally Posted by 13M5F10

CEL will stay on. Power is not affected

This.

The not so good part about leaving it is that if you have another fault that doesn't cause limp mode, you won't know about it.

luis_hp64 · 08-01-2016, 12:31 AM

I could be wrong, but isn't the O2 sensor responsible of make the car leaner or richer? At least on my previous cars, every time the primary O2 sensor went bad, the car would waste a lot of gas because it was running rich. Running rich affects the performance of the car.

Please someone confirm.

EDIT: I was wrong, because after the cat that's the secondary O2 sensor.

ur20v · 08-01-2016, 01:23 AM

Correct... secondary lamda probe is there just to check the function of the cat for the OBDII protocals and has no input on the AFM etc that is the domain of the primary/first lamda probe.

NightM · 08-01-2016, 10:17 AM

Cel can cause limp mode
Annoyance
And throw of different power to limit or compensate for cel light being on.

I know when i had mine on it had power but once off. Runs much better

You need can tool if u running catless

BPMSport · 08-01-2016, 11:12 AM

Quote:

Originally Posted by F10M5Manual

Cel can cause limp mode
Annoyance
And throw of different power to limit or compensate for cel light being on.

I know when i had mine on it had power but once off. Runs much better

You need can tool if u running catless

For other things, not for cat efficiency..

07-31-2016, 02:46 PM	#1
greywolf Private 6 Rep 55 Posts Drives: 2018 M5 Join Date: Oct 2015 Location: Bay Area, CA iTrader: (0)	will cel limit power? If i get catless dp's and not turn off the cel will that limit the power or will the cel just be on and not effect the performance at all.
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07-31-2016, 02:55 PM	#2
13M5F10 Hide! My wife's coming! 812 Rep 2,816 Posts Drives: 2013 BMW M5 \| MSR Stage 3 Join Date: Jun 2015 Location: Las Colinas, TX iTrader: (5)	CEL will stay on. Power is not affected __________________ * SOLD * 2013 BMW M5 \| Space Grey \| MSR Stage 3 Tune \| Catless Downpipes \| MSR Intake and Charge Pipes \| MSR Exhaust (Prototype) \| Vorsteiner Rear Diffuser \| RW Carbon Front Lip \| RW Carbon Trunk Spoiler\| Vorsteiner VS-310 Forged Wheels \| Escort 9500CI w/Laser Jammers
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07-31-2016, 10:11 PM	#3
MCarsFan Lieutenant Colonel 363 Rep 1,805 Posts Drives: 2014 BMW M5 F10 CP Join Date: Apr 2013 Location: Dallas, Texas iTrader: (0) Garage List 2014 BMW F10 M5 [10.00]	I couldn't live with it. Seeing that big orange engine light would driver me nuts. __________________ 2014 BMW F10 M5 ZCP \| SSII / Black \| MSR Stage III \| MSR Intakes \| RPi GTM Exhaust \| RPi Catless Downpipes \|RW Carbon Front Lip \| RW Carbon Diffuser \| RW Carbon Trunk Spoiler \|
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08-01-2016, 12:31 AM	#5
luis_hp64 Enlisted Member 4 Rep 33 Posts Drives: '16 ///M5 & '10 Jeep Wrangler Join Date: May 2016 Location: Miami iTrader: (0)	I could be wrong, but isn't the O2 sensor responsible of make the car leaner or richer? At least on my previous cars, every time the primary O2 sensor went bad, the car would waste a lot of gas because it was running rich. Running rich affects the performance of the car. Please someone confirm. EDIT: I was wrong, because after the cat that's the secondary O2 sensor. __________________ ///M Powaaaa!!! IG: _luis_gomez_
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08-01-2016, 01:23 AM	#6
ur20v Captain 184 Rep 788 Posts Drives: F10 M5 Join Date: Apr 2016 Location: WA Australia iTrader: (0)	Correct... secondary lamda probe is there just to check the function of the cat for the OBDII protocals and has no input on the AFM etc that is the domain of the primary/first lamda probe.
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08-01-2016, 10:17 AM	#7
NightM Lieutenant Colonel 450 Rep 1,519 Posts Drives: Bmw Join Date: Nov 2015 Location: NY iTrader: (0)	Cel can cause limp mode Annoyance And throw of different power to limit or compensate for cel light being on. I know when i had mine on it had power but once off. Runs much better You need can tool if u running catless
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