![Audi Workshop Manuals > A4 Mk1 > Power unit > Motronic injection and ignition system (4-cyl.) > Mixture preparation system, electronic inj.,Gas > Testing electronic engine power control (electronic throttle) > Notes Audi Workshop Manuals > A4 Mk1 > Power unit > Motronic injection and ignition system (4-cyl.) > Mixture preparation system, electronic inj.,Gas > Testing electronic engine power control (electronic throttle) > Notes](https://workshop-manuals.com/audi/a4_mk1/images/a4-2181.png)
Audi Workshop Manuals > A4 Mk1 > Power unit > Motronic injection and ignition system (4-cyl.) > Mixture preparation system, electronic inj.,Gas > Testing electronic engine power control (electronic throttle) > Notes
John Koshy: Have you ever driven through a car wash and seconds later the EPC, Traction Control and Check Engine lights all come on?
![Audi a4 avant quatro b8 2011 got a EPC and Check engine light. Stays on the check engine was blinking at first but then Audi a4 avant quatro b8 2011 got a EPC and Check engine light. Stays on the check engine was blinking at first but then](https://f01.justanswer.com/4JwC7VWU/IMG_1394.jpeg)