ok s posted this in the b5 area awhile ago and nobody could help. got a 96 audi a4 it is quattro and a 5 speed has v6 2.8l 12v sohc afc engine code. 235k on it. ok so this all started after i had my flexpipe replaced. right after that i got check engine codes. all 4 o2 sensor heat ciruict code EGR valvle electrical malfunction and fuel evap ventilation valve electrical malfunction. i replace the egr valve and the egr valve seloniod. also pulled the intake off cleaned it all out new gaskets all that good stuff. and right before the exhause was done i put brandnew rear o2 sensors. well still cant figure it out pulled the ecu cleaned all contacts. took the grounds and cleaned them off the ones under the coolant box and the one on throtttle body and then the ground on passenger side motor mount. so anyone have any ideas

 

what codes, exactly, are you getting? Try clearing all your codes, drive for a bit, see what comes back. sometimes specific codes have a specific solution. it is more effective than just saying "I have an evap code" then taking the shotgun approach to trying to solve the problem

good luck

 

i told you exactly what codes they are minus the numbers cause my scanners at my dads house right now and i did that i keep doing that they come right back on there all electrical malfuncuction codes

 

P1409 tank ventilation valve circ. electrical malfunction
P1400 egr valve circ electrical malfunction
P0161 o2 sensor heater circuit bank 2 sens2
P0141 o2 sensor heater circuit bank 1 sens 2
P0155 o2 sensor heater circuit bank 2 sensor 1
P0135 o2 sensor heater circuit bank 1 sensor 1

 

bumppp

 

anybody?

 

really nobody out there has anything

 

bump emission test soon