Hi, I have a 2009 CC sport which I absolutely love. MIL light goes on every 2 weeks with codes P0171 : $07E8 every time. The problem first started last year, when I took it to the dealer, who changed fuel pump (spark plugs were changed 2 weeks prior), the problem resolved. Since this time I have been using Shell's highest price gas. Few days later MIL showed up again, when I was told there is carbon deposition and asked to use the fuel injector cleaning for 3 full fuel tanks. MIL came back on, this time dealer said, they would have to go in manually and clean up the carbon, which I got done. Later the MIL came back again in 2 months, since than I went to the dealer about 3-4 times with MIL (of course it turns off by the time I get the appointment), dealer had the car for a week but could not reproduce the problem. They asked me to come back in when the light is on. I went in one day with the light on, but to my embarrassment, after I checked in with the service adviser and was waiting in the waiting room, she came back to me in 10 min and said the light was not on.
At this point, MIL comes on once every 1-2 weeks with the P0171 : $07E8 code, car runs fine. MIL clears by next day. Please suggest what could be the problem, do I need to worry about this?
RepairPal Certified shops can diagnose and repair your 2009 Volkswagen CC. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
The P0171 is a lean code the $07E8 is not right,You are missing a letter.If you can bring it to me for a second opinion,We use the VW factory scan tool 6150B with Odis and a cert.That is what I would recommend.Some times we find things the dealer misses.
