bozack

My ESP faults where before I put in my K&N's

geng77

funny.. i'm running K&N filter as well for the past 5 months and now i got the ESP fault and CEL. P0089 and P0101 codes.

geng77

yup... ESP fault went away after i got my MAF sensor cleaned. actually i got the entire air duct thingy cleaned. got rid of the K&N filter and installed an oem filter instead. hopefully CEL will go away soon as well.

smith2010Q7

ESP is part of the traction control system which is part of the Anti Lock Brake system what it does is uses the wheel sensors to determine if there is any slippage or loss of traction it will then activate the brakes on that particular wheel to slow it down to help regain traction, when it activates you may hear or feel a slight rumble as the brakes are actuating.

Do a code read for faults, attachment is all the components that is part of the ESP system.

Audi Q7 - Anti-Lock Brake System Compon and ESP.pdf

geng77

update.. CEL went away. the engine actually runs quieter and smoother now. so note to folks out there. don't install K&N filter.