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NISTECH »
https://forums.nicoclub.com/nistech-u7581.html
Fri Apr 22, 2005 3:39 pm
no as the ecm looks for the sensors and the range of the inputs , if it doesnt see certian readings change when expected, instant code.
That code means it does not see a evap pressure change when it open the purge solonoid vale to purge. Pull the hose off of the purge valve coming from the canister and see if there is charcoal in it. If there is you canister has come apart and the charcoal has been sucked into the lines.