Two days ago my check engine light came on and then it went off for the rest of the night and the next day it popped on again, so today I went to see what the codes were.
I had three:
P0171-system too lean
Probable cause: fault 02, large vaccuum leak, fault maf sensor
P0507-idle air control system rpm higher than expected
Probable cause: throttle plate misadjusted or damaged, faulty IAC valve
P2293-Fuel pressure regulator 2 performance
Now I replaced my cam follower about two weeks ago and my car has been running fine since then, no fuel cuts or anything. The last day my car has been having a high idle...other than that it runs fine.
So what should I check first to see what the problem may be? I know that one thing must be causing all of these codes to come up.
Both sound like the two new recalls/open campaigns for the throttle body/flapper motor, and fuel sensor. If your VIN is included it's a free replacement for the two. I'd start with those.
K04 PLAY...`07 GTI/AWE K04&DV/APR HPFP/S3 INJ's&fmic/RS4 fprv/FORGE fmic & T-B HOSE/TECH.TUNING TB/BSH PCV&MOUNT's/NSP BOOST GAGE/AP Lite-PULLEY/NEUS. P-FLO&BOOST PIPES/GIAC K04 H/O & DSG FILES/13.2"BBK/BILSTEIN DAMPERS/W.A.L.K./H&R SS SPRINGS+F&R-ARB's/TSW 8X18 NURB's...ZOOM DIS! 1/4 mi: 12.82 @ 112 mph