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Hello everyone i have become a new owner of a 1999 passat 1.8t. I am currently trying to figure out what the best approach is to correcting all the different codes that I have been blessed with. Maybe you guys can point me in the right direction. So heres what I'm dealing with.
P0422-main cat. (Bank1) efficacy below thresh
P0116-coolant temp sens implausible signal
P0455-Evap system large leak detected
P1426-Evap purge valve(n80) open circuit
P0134-oxygen(lambda)sens. B1S1 no act.
P0102-MAFS signal low.
My question I guess is where do I start!! Thank you
 

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