I have a '98 SVT Contour with 58k miles. My CEL has been coming on for the past several months. There are NO drivability issues and when I clear the code by disconnecting the battery, the CEL doesn't come back on for 2-3 weeks.

BTW, during one of these 2-3 week periods, my car passed state emissions.

I had the code scanned at Autozone and the two codes were,

P430 and P420...with the message "Cats below threshold".

Any ideas? And why would the CEL stay off for a while when the codes are cleared?

Thanks guys.

Last edited by Black EO; 12/04/02 06:08 PM.