Bryce H20SN8 Posted March 18, 2014 Report Share Posted March 18, 2014 My 2013 Shelby check engine light has come on 7 times in 14 months 6,000 miles. Code P050B. Grapevine Ford in Texas says poor fuel quality buy fuel without ethanol . That is impossible. Second time they say add fuel additive. I did that for 6 tanks and light came on again. This time they say don't add fuel additive and I should contact Ford engineering. they say to drain my fuel tank , which is full and and they send me home with 1/2 and tank and light comes on again. I contact Ford and they tell me to get a second opinion. Never take your Shelby to Grapevine Ford! ! I take it to Five Star Ford in North Richland Hills Texas and same code as usual, they keep it 9 days and replace MAF and reset KAM, replace PCM and do a exhaust leak test. I drive about 600 miles and check engine light comes on again, same code P050B. They say they have never had this problem before. They are the best dealer I have ever dealt with, but they don't know what the problem is. I have had in the shop 5 times for over 25 days, I think the Lemon Law is in effect. Can anyone Help !! I am out of patience by now. Quote Link to comment Share on other sites More sharing options...
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