on September 15, 2009, 10:30 pm, in reply to "Re: Vauxhall Corsa 1.0 2002 - MIL on and code P0170, fuel trim #"
The EGR valve is not fitted. In its place is just the casting - ie no electrical connections. The scan tool is ACR4 g2. The old boy only drives it a few miles at a time in city traffic and the EML will illuminate at any point. The vehicle has been smoke tested courtesy of John Cooke and the latest software added via Tech 2. When I visit the vehicle the emissions are as perfect as you can get but when the EML is extinguished the vehicle immediately sounds lean and O2 rises to about 4.5%. This stabilises to normal after about 10 mins or so. The PO170 is obviously EOBD but when I run the Vauxhall protocol, PO170 is presented as an unknown code. On the odd occaison I might get the fault code relating to misfire (PO300 I think) but no report of misfiring by the owner. I have assumed this to be spurious but will have a closer look.
Will post freeze frame details on my next visit. Thanks for your interest.
Regards
Pete M
