Quote:
Originally Posted by root_werks
CEL did come back on today, P0403, none of the original codes were present. Cleared just for giggles, took about an hour of driving and same P0403 code returned. I'll consider this issue closed now. Hopefully it'll make a good reference for someone else in the future.
On to the next code! 
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The P0403 is a generic code for an EGR system, and I didn't know that these engines had an EGR valve. Maybe someone else knows.
Regards,
paul...