2006 Isuzu i280 Pickup Q&A
2006 Isuzu i280 Pickup Question: P0446,emissions;a perpetual problem. no one can fix. is it a guessing game?
have spent $1000.00 two different mechanics in two weeks and the light is back on again. replaced the evap purge valve hose and electric harness. light came back on after 50 miles. Took it to Authorized service center, they said it is the evap purge valve. No just replaced it, oh ok then it is the canister. ok so they changed the canister, two days later check engine light on again. Seems you could test the parts before replacing all one peice at a time. please help, running out of money. - CeceliaC
Ask for your money back as they did not fix the problem you payed them to fix. You need a smog machine/evap presure guage and a lot of pinch pliers, it may take a while but eventually the smoke will appear, or while pinching the hoses you will see the smoke machine indicate no leak, this would mean the leak is downstream of that hose/plier, keep moving your pliers down stream untill you find the leak - ccsmog
Don't know the right answer without diagnostics, but you are dealing with the wrong service provider! There is no code or computer symptom that informs them that " someone has been in the engine since we were working on it".....he is trying to avoid you. Make sure that is a dealer gas cap, not aftermarket. It concerns me that it took three tries to get an o2 sensor installed correctly....I suspect stripped threads and an air leak in your header (probably too late to help you, but stay away from this shop!). Replacing an O2 sensor is like changing a light bulb- screw the old one out, screw a new one in- it's that simple. You didn't say, but was the O2 sensor done first? - Karmike