Bmw fault code

ttbullet · 03-19-2013, 12:01 AM

Just had this code pull up
1) 2743 Lambda sensor heater resistance diagnostic VKAT bank 2
Does anyone know what this is.
Any help is appreciated.
Thanks

ttbullet · 03-19-2013, 07:53 AM

Bump

edwinm3 · 03-19-2013, 08:02 AM

I think O2 sensor could be shot

ttbullet · 03-19-2013, 08:19 AM

I have a vt1-550 supercharger and primary cats deleted. Would that have anything to do with the code.

tom @ eas · 03-19-2013, 11:42 AM

Quote:

Originally Posted by ttbullet

I have a vt1-550 supercharger and primary cats deleted. Would that have anything to do with the code.

Possibly, or a bad O2 as edwinm3 stated earlier. Feel free to drop by and we can check out the issue in person.

Chriskm3 · 03-19-2013, 11:52 AM

Quote:

Originally Posted by ttbullet

I have a vt1-550 supercharger and primary cats deleted. Would that have anything to do with the code.

Most likely. My had to change my o2 sensors after the install, but have it professionally checked never hurts.

Space Ghost · 03-19-2013, 12:00 PM

Turned out to be O2 sensor for this guy.
http://www.m3post.com/forums/showthread.php?t=812507

BuckRodgers · 03-19-2013, 12:31 PM

02 sensor fault, take it into a shop and have them check it out for you.

ttbullet · 03-19-2013, 01:24 PM

Quote:

Originally Posted by tom @ eas

Quote:

Originally Posted by ttbullet

I have a vt1-550 supercharger and primary cats deleted. Would that have anything to do with the code.

Possibly, or a bad O2 as edwinm3 stated earlier. Feel free to drop by and we can check out the issue in person.

thanks tom. I will be there in a few

BMRLVR · 03-19-2013, 02:51 PM

Quote:

Originally Posted by ttbullet

Just had this code pull up
1) 2743 Lambda sensor heater resistance diagnostic VKAT bank 2
Does anyone know what this is.
Any help is appreciated.
Thanks

O2 sensor heater circuit resistance is out of range. May be the sensor, a connector/plug, or somewhere in the circuit wiring.

edwinm3 · 03-19-2013, 03:17 PM

IIRC circuit is fused protected

BMRLVR · 03-20-2013, 02:45 AM

Quote:

Originally Posted by edwinm3

IIRC circuit is fused protected

What does that have to do with it? High resistance on that circuit won't blow the fuse since fuses are rated on amperage draw........ One of the only things that will blow the fuse is a short to ground before the load (O2 sensor heater). Higher resistance (a corroded plug, high resistance in the wiring, etc) will lower the amperage flowing through the circuit. Every circuit that goes through the ECM is monitored for voltage which will tell if the circuit has lower or higher than normal resistance.

edwinm3 · 03-20-2013, 07:36 AM

Quote:

Originally Posted by BMRLVR

Quote:

Originally Posted by edwinm3

IIRC circuit is fused protected

What does that have to do with it? High resistance on that circuit won't blow the fuse since fuses are rated on amperage draw........ One of the only things that will blow the fuse is a short to ground before the load (O2 sensor heater). Higher resistance (a corroded plug, high resistance in the wiring, etc) will lower the amperage flowing through the circuit. Every circuit that goes through the ECM is monitored for voltage which will tell if the circuit has lower or higher than normal resistance.

my post wasn't directed to what you said, it was a response to the OP's first post. Your post makes sense and I agree with you. Im Just trying to help the op here, it doesn't hurt to check, maybe not a blown fuse but a weak/loose connection, anything is possible.

BMRLVR · 03-20-2013, 03:05 PM

Quote:

Originally Posted by edwinm3

my post wasn't directed to what you said, it was a response to the OP's first post. Your post makes sense and I agree with you. Im Just trying to help the op here, it doesn't hurt to check, maybe not a blown fuse but a weak/loose connection, anything is possible.

Understood, I apologize!

edwinm3 · 03-20-2013, 03:32 PM

Quote:

Originally Posted by BMRLVR

Quote:

Originally Posted by edwinm3

my post wasn't directed to what you said, it was a response to the OP's first post. Your post makes sense and I agree with you. Im Just trying to help the op here, it doesn't hurt to check, maybe not a blown fuse but a weak/loose connection, anything is possible.

Understood, I apologize!

Not a problem

03-19-2013, 12:01 AM	#1
ttbullet Second Lieutenant 29 Rep 243 Posts Drives: 2009 135i Join Date: Oct 2008 Location: 949 area code iTrader: (0)	Bmw fault code Just had this code pull up 1) 2743 Lambda sensor heater resistance diagnostic VKAT bank 2 Does anyone know what this is. Any help is appreciated. Thanks
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03-19-2013, 07:53 AM	#2
ttbullet Second Lieutenant 29 Rep 243 Posts Drives: 2009 135i Join Date: Oct 2008 Location: 949 area code iTrader: (0)	Bump
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03-19-2013, 08:02 AM	#3
edwinm3 Brigadier General 980 Rep 4,001 Posts Drives: F82 Join Date: Nov 2011 Location: Broward iTrader: (32)	I think O2 sensor could be shot __________________ Grigio Telesto M4, 6MT. Coyote 5.0 F-150 991 GT3
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03-19-2013, 08:19 AM	#4
ttbullet Second Lieutenant 29 Rep 243 Posts Drives: 2009 135i Join Date: Oct 2008 Location: 949 area code iTrader: (0)	I have a vt1-550 supercharger and primary cats deleted. Would that have anything to do with the code.
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03-19-2013, 12:00 PM	#7
Space Ghost Captain 11 Rep 619 Posts Drives: E92 M3 Join Date: Aug 2008 Location: USA-PA iTrader: (5)	Turned out to be O2 sensor for this guy. http://www.m3post.com/forums/showthread.php?t=812507 __________________ 2008 E92 M3, ESS VT-1, AA Full Exhaust, Volk TE-37, PSS10, ST BBK, ARKYM Motorsport Spliter, Vorsteiner Diffuser, BMW Edition Grill/Gill's, BMW Performance Spoiler, AUTOcoture Blacked Out Headlights, LCI Tail lights, Vorsteiner Carbon Fiber Center Dash Insert, Ultimate Racing Pedals (Because Race Car), AA SSK, Speed Cloth.
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03-19-2013, 12:31 PM	#8
BuckRodgers Private First Class 3 Rep 159 Posts Drives: BMW Join Date: Dec 2012 Location: USA iTrader: (0)	02 sensor fault, take it into a shop and have them check it out for you.
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03-19-2013, 03:17 PM	#11
edwinm3 Brigadier General 980 Rep 4,001 Posts Drives: F82 Join Date: Nov 2011 Location: Broward iTrader: (32)	IIRC circuit is fused protected __________________ Grigio Telesto M4, 6MT. Coyote 5.0 F-150 991 GT3
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