My check engine light is on and I got my codes scanned at autozone. Any help where to start and suggestions would be very helpful. Thanks a lot
2002 A6 2.7T 125K

P0171 system too lean bank 1
P0174 system too lean bank 2
P0300 Random/mulitiple cylinder misfire

 

Corrective actions for shopkey says to check these.

1. Check fuel pressure reg and residual pressure.
2. Check Fuel injectors
3. Check air intake for leaks
4. Check fuel pump
5. Check secondary air injection system for proper seal
6. Check vacuums lines

 

Could be the MAF is dirty and needs cleaning. Probably a vacuum leak so you want to check them. I would get a can of carb cleaner, idle the engine and spray every vacuum line. When the idle drops, you have your problem. Could also be fuel pressure but I would check that after I did the two items above.

Bob

 

Thanks guys, i'll try those out and hopefully that takes care of it