Originally posted by Ray:
In your linked reference, nobody brought up that it could be a vacuum problem (green vacuum hose on top of the EGR could be cracked, split, or removed, etc..) though it would likely cause a lean condition code for the downstreams as well. I have seen it cause a 0401 without anything else, though.



Ray



That's why we have experienced moderators as a catch all for insufficient diagnosis. Thanks.

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles