Lambda error urs6

[Angus Young]

Hey guys I just need few opinions on my problem here!
After changing IAT on my urs 6 a whole 3 days of driving with no problems I felt a drop in performance and soon after that got another error code which is 2341 that is 4 lambda if I'm correct... so what I did I changed it with another one that worked good in a friends car! No error codes 4 few day after that until today when I noticed a RPM raising and dropping in neutral... also I have noticed when I let the throttle RPM goes up and than calms after few secs. I'm also gettin the same error code again! After reseting my eccu I dont get any codes but the RPM jumping is still here and car doesnt pool really god in full boost...

It's not a problem 4 me to buy brand new lambda but I'm just wondering if there can be another thing that cause lambda not to work ok...??? cause I already changed 2 of them... none of them were brand new but I repeat both worked on other cars...

[elbow]

try to clean the MAF with brake cleaning spray...

[Angus Young]

I checked the maf 2 days ago... thought it doesn't need cleaning cause it looked clean like brand new... had that maf 4 about 2 years now, bought it brand new

[Monkeymagic]

Vac leak..?

[UrS4boy]

Meaning of 2341

2341 (Blink Fault Code), 00537 VAG1551/2 Fault Code Number
Oxygen Sensor Control Limit exceeded,
fuel pressure too low or too high, intake or exhaust leak, defective ignition system component, intake air leak after air mass sensor, O2 sensor is faulty
Symptom: CO before catalyst is below 0.3% or greater than 1.0%, Extremely lean or overly rich exhaust, Spark Plug fouling

Many other potential problems besides the O2 sensor.

[UrS4boy]

...No error codes 4 few day after that until today when I noticed a RPM raising and dropping in neutral... also I have noticed when I let the throttle RPM goes up and than calms after few secs.

Are you sure that when you replaced the IAT sensor that you plugged in the IAT harness connector to the IAT and not the Idle Stabilization Valve (ISV) connector into the IAT and the IAT into the ISV? It is physically possible on an AAN UrS engine.

Regardless, you might want to check the ISV for being clean and properly connected.

http://forums.quattroworld.com/s4s6/msgs/21853.phtml

[Angus Young]

I'm pretty much sure we did everything ok but I'll double check tomorrow... we have also installed IAT that got last letter C not B... cause the 034-905-379 B wouldnt work properly 4 some reasons I got error code every 2 weeks 2 3 2 2 ... and now Im not getting 2322 but this other error code...

[UrS4boy]

I'm pretty much sure we did everything ok but I'll double check tomorrow... we have also installed IAT that got last letter C not B... cause the 034-905-379 B wouldnt work properly 4 some reasons I got error code every 2 weeks 2 3 2 2 ... and now Im not getting 2322 but this other error code...

034905379B is the correct PN for the AAN IAT sensor. My good friend, Kate, the friendly parts girl says she's never heard of a 034905379C.

G42 AAN IAT info: http://forums.quattroworld.com/s4s6/msgs/20996.phtml