NYC 911

i know i need to change the coolent temp sensors, but now i just triggered a CEL and these are the VAG codes. My guess is that the O2 sensors are crapped too.
175784-o2s ccorrection behind catalyst b1 limit reached
175785-o2s ccorrection behind catalyst b2 limit reached
Also does anyone have a copy of the extended emmissions warranty that they gave the 2000 s4's?

TIA

NYC 911

it's the bad coolant temp sensor that's causing a lean condition that's triping the codes...

make sense????

tia

Ochlockonee

can you tell me the codes in obdII format? I.E. Pxxx

My2ndS4

These codes can be triggered when you accidentally replace the rear O2 sensor's in the wrong position, ie left sensor on right side.

NYC 911

thats right i suck at teh typing

NYC 911

do they need to remove the cats to change a transmission?

My2ndS4

It's easy to get the left and right sensors mixed up.

PSmalls::DoggieStyle

Yes! Maybe they put your secondary 02 sensors in reversed.

NYC 911

not that i know of..how can i tell if they are reversed?

My2ndS4

Switch them and see if it goes away.