I have an intermittent fault with my passenger side EGT sensor according to VCDS, will this cause the ecu to limit power? No engine management light comes on when driving. I did watch live readings and when the exhaust temp gets to 395 degrees the reading from the passenger side shoots up to 1100 degrees. This 1100 degrees seems to be a default reading or substitute value as if you disconnect the sensors when running the reading immediately go to this value.
After a bit of googlling it appears Audi EGT sensors are pretty poor quality due to the laws about lead free solder. My sensors were replaced when I had the gearbox rebuilt so would be the newer lead free versions which have only lasted 10,000 miles. Unfortunately they are out of the 2 year Audi parts warranty so I'm going to try and get to the circuit board and hopefully fix it. Am I right in thinking the RS6 EGT sensors are wideband? If so that's a shame as some Motorsport company in Poland make replacement circuit boards but from what I can tell ( I can't read Polish) they are not wideband.
EGT sensor faulty.
EGT sensor faulty.
Last edited by bilko1 on Sat Oct 31, 2015 10:49 pm, edited 1 time in total.
Avus Avant, RNS-E mk2 with sds and Bluetooth, Milltek, Hotchkis, Bilstein, Forge, ITG, A.C.E, Wagner, FBMFSW, MTM.
Re: EGT sensor faulty.
I have heard of people having success reflowing the solder on the boards.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: EGT sensor faulty.
The polish guy's new boards are supposedly ok.
There is however a few weeks of back order - iv got the next set due.
I may not need them so if you want them i'll sell you them once they arrive
There is however a few weeks of back order - iv got the next set due.
I may not need them so if you want them i'll sell you them once they arrive
Re: EGT sensor faulty.
Thanks Dave, after a bit more Googling I have managed to contact the Polish guy (Sid) so I've bought a pair. Next question how do I get black goo out of the sensor box without destroying the circuit board / connectors ? Is there a magic chemical that dissolves it ? I'm a bit annoyed at myself for buying new Audi ones when I had my Gearbox done, the original ones are a lot easier to remove the board out of. Hindsight is wonderful.
Avus Avant, RNS-E mk2 with sds and Bluetooth, Milltek, Hotchkis, Bilstein, Forge, ITG, A.C.E, Wagner, FBMFSW, MTM.
Re: EGT sensor faulty.
I wonder what they use. Does it chip? Or is it rubbery? I'd try and get a bit of and then try dissolving it in the usual suspects: acetone, Isopropyl Alcohol, thinners, white spirit, petrol, etc.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: EGT sensor faulty.
You can open them up and fix the solder, works most of the time. Someone just did a full write up with pics on rs6.com.
Revo Tune + extra ME7 fueling - MTM TCU - Wagners - Koni Struts - DevilSown W/M - Michelin PSS's - Hotchkis Sways - Upgraded TC/Trans - Mugello/Black/Carbon
Re: EGT sensor faulty.
Yeh, I read that thread. A good how-to guide. 
"not a professional engineer, mechanic and mechanist"
Re: EGT sensor faulty.
How'd you make out?bilko1 wrote:how do I get black goo out of the sensor box without destroying the circuit board / connectors ?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: EGT sensor faulty.
Circuit boards have turned up, just waiting till I get a day off to have a looksy.
Avus Avant, RNS-E mk2 with sds and Bluetooth, Milltek, Hotchkis, Bilstein, Forge, ITG, A.C.E, Wagner, FBMFSW, MTM.
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