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Discussion Starter · #1 ·
Just purchased a 2011 fortwo passion I see comments regarding 451,450 and 453 can someone enlighten me how I know what I have??? I’m having trouble with the check engine light coming on, put a tester on it and says it is the secondary air pump so I bought new one and also new air filter and after installing and clearing the code I drove about 20 miles and the cel is back on!! Any ideas????
 

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Discussion Starter · #3 ·
Yes sorry it’s been so long the light finally cleared and then it came back on yesterday but noticed the pump noise doesn’t come on when I start the engine will this hurt to drive it like that also then the tire light came on so replaced all sensors still didn’t help thinking replacing the module
 
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