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Discussion Starter #1
I had ecu replaced , mechanic cut some wires to ecu , does anyone know what wire to look for at ecu for p0452
evap control pressure system switch
Please need to pass emissions asap
QX56 2008
 

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Discussion Starter #3
Why?


Also why?, why not bring it back and make them fix it correctly?

You can look in the posted service manuals to see how to properly diagnose that code or of course take it to the mechanic.
He was testing it ,to confirm failure,
ecu was dead had it replaced
cant go back he is out of business.
I just wanted to know what wire is responsible for evap from the ecu maybe not spliced well.
Please advise
 

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Unplug the switch and look. The wires run right from the ecu, you should be able to match the colors from the switch to see which one is loose.
 
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