Rear 02 sensor [Archive]

sleepydsm

01-17-2005, 02:31 AM

I've got a '95 Tsi AWD. I know nothing about 2Gs. Do you need the rear o2 sensor? Without it will it throw a CEL? Is there any way to eliminate it, or trick the ECU into thinking it is still there? Do performance exhausts have a bung for the rear o2?

Kracka

01-17-2005, 02:47 AM

W/0 the rear o2 sensor you'll throw a code, but it won't have any performance affects besides a red light staring right back at your face. Cat-back exhausts have nothing to do with the rear o2, it is all in the cat, you'll loose the bung if you get a test-pipe. With a test-pipe you can either live with the light, get an electrical simulator, or make a mechanical simulator

Khadgar

01-17-2005, 03:02 AM

http://vfaq.com/mods/O2bypass.html

sleepydsm

01-17-2005, 11:47 AM

thank you!

blageo23

01-26-2005, 11:57 AM

Has anyone done that? Im searching around trying to find out what to buy for resistors and what not. Does anyone know what I need to buy? Or pictures of what I need to buy.
Thanks,
Mike

blageo23

02-28-2005, 11:20 PM

Come on there has to be someone out there that has done this before. I have tried but the resistors keep smoking and burning up. NEED HELP!

Khadgar

02-28-2005, 11:37 PM

I would try PMing Lightning GSX, he knows his stuff and has talked about elminating other sensors in a similar manner.

LightningGSX

03-01-2005, 01:57 AM

Like I was saying in the PM, the ones from Radio Shack are usually 1/4 watt carbon film types.You'll need at least a 12 watt resistor, which will be a wirewound type, and I doubt Radio Shack will have it.This one should work-

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=401377&e_categoryid=354&e_pcodeid=71013

Or 2 of these in parallel-
http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=016-25

The latter would be the best option

LightningGSX

03-01-2005, 06:58 AM

As I look at the VFAQ on this, I can't imagine that a 1 meg resistor would actually work.I would just unplug the sensor, not hook up any resistors and see what happens.It should pop a CEL, but since the DSMs' emission diagnostics is nearly worthless(especially on 95s), there's a good chance it won't turn on the CEL anyway.