Engine Light
Thread Starter
Member
Joined: Aug 2007
Posts: 89
Likes: 2
2012 S350 ,2013 ML350,'08 C300
Engine Light
Engine light just came on yesterday and has stayed on. Last visit to dealer the O2 sensors (two) were replaced and they recommended using premium gas other than that purchased at Kroger. Filled up ever since with Shell V-Power and now after two months and the third time in 6 months engine light back on.
Has anyone had this problem?
Has anyone had this problem?
Senior Member
Joined: Dec 2009
Posts: 287
Likes: 55
From: McLean, VA
2011 Audi A4, 2014 E63S Wagon, 2020 GLS 580
I had a similar problem recently in my Audi S5. Took it in and they put an additive in the tank and ran it to half full. Then they filled it and put more additive in. They told me to only use Top Tier premium, which in my area pretty much means Shell or Chevron. I had been using premium but hadn't been too selective on brand. I haven't had the light since. My wife's A4 started doing the same thing. So we ran it to empty and filled with Shell V-Power premium and now the light has gone off. I wonder if the refiners have been changing their formulas in a way that throws off the emissions systems?
You can read more about Top Tier gas here Top Tier Gas
You can read more about Top Tier gas here Top Tier Gas
MBWorld Fanatic!
Joined: May 2007
Posts: 2,244
Likes: 1
From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
It's got to be tough for manufacturers outside of the USA to produce engines and emissions systems that can deal with what basically are lower grade gasolines here. I'm not being facetious, the refinement of both petrol and diesel fuels overseas, at least in western Europe, is much higher than here in the US. Their fuels are higher in octane and detergents, and Shell V-Power in Europe can actually improve mileage and engine life, both in its petrol and diesel version (the petrol being the only flavor here - with the caveat that it's nothing like the stuff "over there").
Anyway, I'd give that "top tier gas" a shot a few times before heading in for service.
Anyway, I'd give that "top tier gas" a shot a few times before heading in for service.
Thread Starter
Member
Joined: Aug 2007
Posts: 89
Likes: 2
2012 S350 ,2013 ML350,'08 C300
Thanks guys. I found out today its a catalytic converter that has supposedly been causing the O2 sensors to code. Dealer is replacing the cat converter tomorrow morning, however, its Top Tier and Jectron or techron additvie from here out.
