The check engine light keeps coming on
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2001 Oldsmobile Alero Question: how much will it cost to replace an EGR circuit with the diagnostic code of P040
Answer #1mastertech6371 October 29, 2011, 20:38Master
your missing a number after the 0. we need that number to help you.
Replylikescountry114, October 29, 2011, 22:15Rookie
Ok its P0401....thank you!
Replymastertech6371, October 30, 2011, 05:13Master
that is a code for insufficient flow. you need to verify that vacuum and exhaust are getting to the valve before jumping to any conclusions. I would have a shop verify this and give you a pin point reason for the failure.