how do I know which o2 sensor to replace(which is catalytic converter 2

joec500 · 08-30-2009, 05:23 AM

as the title says...

I just threw this code, but I have reset everything and it seems to have gone away, but I would like to replace this o2 sensor as a precautionary step as they seem relatively inexpensive.

ToadHollow · 08-30-2009, 10:41 AM

Go to BMSTuning.com for install instructions & info.

luca335i · 08-30-2009, 10:49 AM

Whats the BT code ? I'm getting 29f4 code. I'm running hfc catted dps and I think there causing it. U running catless dps?

ToadHollow · 08-30-2009, 10:53 AM

If you guys are throwing codes AFTER the catted dp install THEN the related code(s) should be 402 & 403 (left/right exhaust bank, catalytic converter deficiency).

If that's the case an O2 sim will take care of it. Install the sim & then wipe out the codes. The code may reappear during the car's adaptation time. Once the car's computer adapts the code will disappear.

08-30-2009, 05:23 AM	#1
joec500 Brigadier General 125 Rep 3,004 Posts Drives: it has 4 wheels Join Date: Jul 2008 Location: San Francisco iTrader: (10)	how do I know which o2 sensor to replace(which is catalytic converter 2 as the title says... I just threw this code, but I have reset everything and it seems to have gone away, but I would like to replace this o2 sensor as a precautionary step as they seem relatively inexpensive. Last edited by joec500; 08-30-2009 at 10:21 AM..
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08-30-2009, 10:41 AM	#2
ToadHollow Once upon a time ...... 276 Rep 5,048 Posts Drives: 2008 JB E92 - SOLD 5/2010 Join Date: Sep 2008 Location: Asti, Italy & Austin, Texas iTrader: (16) Garage List 2008 E92 335i [8.00]	Go to BMSTuning.com for install instructions & info. __________________
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08-30-2009, 10:49 AM	#3
luca335i Major 57 Rep 1,193 Posts Drives: 335I Sedan Join Date: Jan 2008 Location: Unknown iTrader: (3)	Whats the BT code ? I'm getting 29f4 code. I'm running hfc catted dps and I think there causing it. U running catless dps? __________________
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08-30-2009, 10:53 AM	#4
ToadHollow Once upon a time ...... 276 Rep 5,048 Posts Drives: 2008 JB E92 - SOLD 5/2010 Join Date: Sep 2008 Location: Asti, Italy & Austin, Texas iTrader: (16) Garage List 2008 E92 335i [8.00]	If you guys are throwing codes AFTER the catted dp install THEN the related code(s) should be 402 & 403 (left/right exhaust bank, catalytic converter deficiency). If that's the case an O2 sim will take care of it. Install the sim & then wipe out the codes. The code may reappear during the car's adaptation time. Once the car's computer adapts the code will disappear. __________________
	Appreciate 0 Quote