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mercedes 430
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45 Posts
Discussion Starter #1
hello everyone i need your help, my check engine light, is on so i got my handy obd 2 reader out and hooked up the code reader, i got P2421 Evaporative Emission System Vent Valve Stuck Open, has anyone here had this happen to their s550? any if please so i can get an idea to check on this problem. thanks before hand
 

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2007 S550
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2 Posts
Same thing happened to my car couple days after I bought it. It's some gas cap sensor. Had my indy clear the code and it hasn't come back since. I'll replace it eventually ....
 
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