P0171, P0507
 

Hi, I have a 2005 Audi A4 2.0T

I downloaded these codes using an OBDII

P0171 System Too Lean (Bank 1)
P0507 Idle Control System RPM High

Any idea what the fix might be?

Thanks all.

RE: P0171, P0507
 

well whatever they are, I went ahead and deleted them (turning off the check engine light). I want to force the light on again and download the codes to be sure they are the right ones.

RE: P0171, P0507
 

perhaps clogged injectors?

RE: P0171, P0507
 

after driving about a week, the light finally came back on. i read in a few posts thatP0171 might be the MAF sensor. the reason i created a new post was because i also had the P0507. they recommended i clean the MAF sensorbefore replacing it so i did thatand cleaned out the air filter. i returned the scanner so i had to clear the light by disconnecting the battery.

does anyone think the 507 might be caused by the 171?

RE: P0171, P0507
 

umm?

RE: P0171, P0507
 

clean your MAF and reset the codes. if you keep on comig into problems private message either Techbod or auditech79