Sandy Elvenholl

Anyone have this happen? Just moved from N. Cali to Littleton CO....car was shipped out. Running fine. Put gas in for the first time at Conoco (93) and a day later, check engine light comes on. Seems to be staying at higher RPMs before shifting, too.

Suggestions? Help? Advice?

Other gas station options locally are: King Soopers, Valero. Would have to drive a good way for Chevron. Was using Arco in Cali. Never had a check engine light come up on this vehicle.

2007 Q7

Thanks in advance!

VAG-Fan1

Speculating here, but maybe it's a combination of "abrupt" altitude change and change in fuel formulation, even if at the same octane rating....

lx4life

SCAN it that is the best way to find out, then post it here, then we can help you a little more. Right now you are assuming its the gas.

Force-1

FWIW, Conoco is a Top Tier certified gasoline.

And I got a CEL in my 2013 S5 a few weeks ago, which required several parts to be replaced per TSB.

cuatrokoop

I'd check the obvious if you don't have access to a scan tool, like fuel filler cap. I had to replace the fuel filler cap on the 3.6 to cure a check engine light (I scanned it with my VAG-COM first). I am assuming that I will be replacing the 4.2's cap soon, as the rubber seal has many cracks.