Anyone Else Get P0440 With Aftermarket Exhaust

[bmx_02]

I just put on a simple glasspack on my truck but now every 3 weeks or so it throws me the code p0440 evaporative emission malfunction... im pretty sure thats what it is off the top of my head im too lazy to look it up in the book right now... so im 99 percent sure its because of the glasspack i think... and im wondering if anyone else threw a code after installing an aftermarket exhaust and if it did what did you do?? fix or just erase the code every month??

[dlstewart01]

NO.

 

Don

[Rocco715]

I'd check your gas cap first, if that doesn't solve it you might have a slight leak in one of the lines so you'll need to run smoke through them to find out where its coming out. I highly doubt it is the muffler cuasing the problem.