P0442 Code Again

[mhorn0817]

2004 gmc yukon denali, 85K miles...hey guys, i got the p0442 code about a year ago and i replaced the gas cap and the purge valve solenoid with GM replacements, had the code cleared and it was fine and went away. Now almost a year later the CEL comes back on with the same p0442 code. Gas cap is and has been tight and there has never been a "tighten fuel cap" message. So now what could be the problem and what should i check? maybe the evap vent canister solenoid??? i read you can get a cavalier replacement for 30 bucks instead of getting the 300 dollar replacement that has to be rerouted. or are there other things i should check first. i just hoses anddidnt see any cracks, holes or leaks...thanks in advance!!!

[jrrod2004]

I got mine that reroutes the breathing box and filter away from the underside of the carriage for 90 bucks or so...well worth it since I put my remote filter/intake box in the engine bay near the PCM

 

 

Edit: you could always remove the vent solenoid and bench test it

[tanked_darren]

I got mine that reroutes the breathing box and filter away from the underside of the carriage for 90 bucks or so...well worth it since I put my remote filter/intake box in the engine bay near the PCM

 

 

Edit: you could always remove the vent solenoid and bench test it

 

+1

[mhorn0817]

what and where did you get your relocating kit...also how did you do your remote filter and intake box... also how do you bench test the solenoid?

[tanked_darren]

what and where did you get your relocating kit...also how did you do your remote filter and intake box... also how do you bench test the solenoid?

 

You can just take the old filter and move it to the engine bay, use 5/8" heater hose and hose clamps.

Those plastic hoses on there are garbage, I had this happen under warrenty to my personal truck and the dealer even uses heater hose.

 

Not sure about the bench testing.

[mhorn0817]

any pictures thta can help me out as well?