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2004 E-320
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Hi everyone. I just failed my smog check because I reset the CEL with my OBD2 reader just before I went in for the check. I did this because the CEL comes on once in a while with P0446 and P0451 and then it goes away. I just wanted to be safe.

But I failed because the smog check has a detection capability of knowing when I reset it. Anyways, the smog check guy told me to come back after It goes through the necessary drive cycles and hopefully the CEL won't be on.

Does anyone know exactly what the drive cycle is for a 2004 E-320?
 

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usually you have to drive at least 200 miles. juss drive regularly shutting the car off n letting it cool as if leaving overnight n driving again in the am. but if the codes return then you wont ever get an inspection to pass. what are the codes for cant recall of the top of my head
 
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