can you trick you egt sensor with a resistor or bypass

[onearun]

my driverside egt is blown and i need to replace it. I was wondering if you can put a resistor on the harness to trick the ecu or if you can splice the driver side egt into the passenger to bypass the driver side egt? any help is appreicated. also can you use a passenger egt to replace the driverside ecu, is it long enough to work?

[s2the4]

my driverside egt is blown and i need to replace it. I was wondering if you can put a resistor on the harness to trick the ecu or if you can splice the driver side egt into the passenger to bypass the driver side egt? any help is appreicated. also can you use a passenger egt to replace the driverside ecu, is it long enough to work?

Stop right there if it is broken you should fix it and not half ass it. It will only give you more headaches down the road.

[onearun]

i just wondering why more people dont try to bypass them. i mean they are more or less like a switch from what i am reading. and they are like 250 plus.

[mholme]

If there was a way to do it like this, someone would have discovered and documented it over the past 10+ years this car has been around. They need to be properly written out of the software on the ECU or replaced when they fail, period.

[onearun]

just wondering did not find anything searching, but i did find a guy that did connected one egt to the other to bypass it and said it work with out cel. so just wanted to see if others have tryed it. also it does not really matter how long the car has been around there is always room to innovate new products and procedures. but thanks for the advice. only owned my s4 for couple of months.

[mholme]

The only innovation that has come along and will ever come along in the way of these sensors is to code them out via a tune. Same with rear O2 sensors. It needs to be taken out through the software, not in the wiring. EGT sensors are very sensitive to signal inputs and you will throw a code if you try to fool the ECU through the wiring path.

[onearun]

thanks for the heads up that is what i wanted to hear(not really but some things you cant fight). will not mess with them and instead buy a new one. will a passenger side egt be long enough for a replacement for the driverside egt or does it only work the other way around

[mholme]

Depending on the year of your car, both sensors could be the same. They mount and are keyed/routed differently after a certain production date, but plenty of people have used them on either side.

[sCeRaXn]

^^^That man knows his egt's so id definitely listen to what he has to say!

[onearun]

its a 2001.5. are they interchangeable. 6speed

[mholme]

http://www.audiworld.com/tech/eng73.shtml

[onearun]

i read that already but dont know about the length it they both will reach?

[mholme]

They are piggy backed for your year, so they should reach either side fine.

[S4NORICE]

Someone on AW actually did try the whole resister thing a while back. From what I read, it looked like way more of a hassle then just replacing the damn things. Yeah, they're expensive, but do you really want to make a rats nest of wiring inside you engine compartment? Not to mention spend hours and hours to get the damn things to send the right signal back to the ECU? Don't do it man, just replace them.

You can get away with used ones, but it probably won't be long before they fail as well. Last I checked, they go for around $100 used in the classifieds. Back when mine were bad, I just coughed up the dough for brand new ones cause I didn't want to spend 200 on used and have them fail a month later. Knowing my luck, that's exactly what would've happened... In the end you'll be happy that you did it the right way, and chances you won't ever need to replace them again.

[VinNyS4]

I have the same problem dirivers side egt, is you car throwing a code for it? and do you feel any difference in performance?

[S4NORICE]

I have the same problem dirivers side egt, is you car throwing a code for it? and do you feel any difference in performance?

My drivers side was bad and it was throwing a code, but I never got a CEL. I think it takes both of them to fail to throw a CEL, but I'm not really sure. Mine was somewhat intermittent, sometimes it'd be fine, and other times (hot days mostly) it'd act up and throw me in limp cutting boost down to 5psi or so. So yeah, I definitely felt a difference in performance when it was acting up.

[Militant-Grunt]

If there was a way to do it like this, someone would have discovered and documented it over the past 10+ years this car has been around. They need to be properly written out of the software on the ECU or replaced when they fail, period.

Yup, they're coded out on my car =D.

[Militant-Grunt]

I have the same problem dirivers side egt, is you car throwing a code for it? and do you feel any difference in performance?

The boost becomes choppy and inconsistent, that and the car doesn't pull as hard. Its very noticeable.

[mholme]

Someone on AW actually did try the whole resister thing a while back. From what I read, it looked like way more of a hassle then just replacing the damn things. Yeah, they're expensive, but do you really want to make a rats nest of wiring inside you engine compartment? Not to mention spend hours and hours to get the damn things to send the right signal back to the ECU? Don't do it man, just replace them.

Exactly. And I don't think the guy on audiworld was ever successful in his attempted hack, but it has been tried. Same with the guy who tried to fool the O2 sensors. That somehow made it to a tech article even though everyone who tried it, it didn't work.

[onearun]

yeah i have inconsistant boost, and if feels really rough at part throttle like crusing and boosting right about 0psi, it feels better at night when it is cooler. but i have a hard time reaching 17psi it only goes to 13-14. and feels like its pulling timing. i have check twice for boost leaks. and i keep getting a code for the driver egt intermitingly going bad.

[S4NORICE]

yeah i have inconsistant boost, and if feels really rough at part throttle like crusing and boosting right about 0psi, it feels better at night when it is cooler. but i have a hard time reaching 17psi it only goes to 13-14. and feels like its pulling timing. i have check twice for boost leaks. and i keep getting a code for the driver egt intermitingly going bad.

Yeah, its toast man. If you decide to buy new ones, genuinevwaudiparts is the cheapest you'll find. I think they only sell the in pairs though. This is the part number 078998124B, it includes both of them.

[M.S4]

You can connect the signal wires on the two connectors, and plug in the good egt.

Mine are coded out but for awhile I got a file without the EGT delete.

GL

[TWiST]

This is how I coded out my EGT sensors on my car, so far so good, not much road testing yet though, but when it would throw the fault before it has not for much longer.

CDATR 0x18196 Configuration byte diagnosis exhaust gas temperature regulation
CDATS 0x18197 Configuration byte diagnosis exhaust gas temperature sensor

CLAATR 0x106b0 Error class exhaust gas temperature regulation
CLAATR2 0x106b1 Error class exhaust gas temperature regulation bank 2

CLAATS 0x106b4 Error class exhaust gas temperature sensor
CLAATS2 0x106b5 Error class exhaust gas temperature sensor bank 2

The 181xx range was the same on my AA box ecu but the 106xx range was a tad different the dummy table starts (I believe) at 1073B on my revision AA box ecu.

[onearun]

is it just one wire are is it the shielded type? more info on doing this would be great. its not for a permant fix but just a temperary one till i get the money or get it coded out.

[TWiST]

I can get you sorted out with an EGT delete on your tune if your interested, PM or email me

[jameskkk3]

have your tuner code them out

[Tech/Sales@VAST]

We've been coding them out for a while no troubles at all...

[TWiST]

Have to make sure you fueling is good as well cause if you have a forward o2 issue the EGT is the backup to enrich the fuel and if you do not have that backup you really want to make sure things are good encase any unforeseen circumstances may arise.

[onearun]

i have giac tune, how much to tune it out?

[diaftia]

What does it take to tune it out? Can you do it with a VAG-COM?

[diaftia]

What does it take to tune it out? Can you do it with a VAG-COM?

nevermind... just saw this:

http://www.audizine.com/forum/showth...CU-%28ME7.1%29

[TWiST]

Unfortunantly no you cannot do this with vagcom you have to have a KWP or Galletto to pull down the bin file change the 6 sections and then flash it back to the ecu, I may be able to help you out, PM or email me. You are in cali I see, that makes things much easier depending how far you are from me.

I see you did PM me from before sorry been busy at work, I PM'd you back

[diaftia]

Unfortunantly no you cannot do this with vagcom you have to have a KWP or Galletto to pull down the bin file change the 6 sections and then flash it back to the ecu, I may be able to help you out, PM or email me. You are in cali I see, that makes things much easier depending how far you are from me.

I am in CA but I am in the Bay Area. I think you are in SoCal? Can you do these changes to a stock ECU or do you need to swap things out to put a programmable chip in it? I have a spare stock ECU (GIACX in the car now) that I might be able to fool around with.

[TWiST]

Check your PM

[AudiXS4X01]

No sense in buying new EGT's, its cheaper to just code them out and you'll never have to worry about them again..