: DTC P0442 keeps coming

04-04-09, 09:41 AM

In December I took it in for this problem right after I bought the truck. The dealer said it was a P0442 code. This means a small leak is detected in the Evaporative Emission (EVAP) System.
They sold me a new fuel cap at that time.
1 month later, it happened again, and they simply reset it at no charge.

Now, again, my SES light has been on for at least 1 month...more than 40 warm up cycles, which resets the light if not detected again.
Today I took it back in and its the same code again.
They simply reset it and said they will have to do extensive testing to find the leak.
What do u guys know about this problem?

04-07-09, 02:19 PM
Could be a faulty gas cap or leak in hoses or evap canister! Check this link for more! Hope this helps! They can do a smoke test on it to find the leak!

04-07-09, 04:32 PM
WOW...Nice link
Thanks alot.
So far, the light has not come back on since the Saturday reset at the dealer.
I already purchased a new factory fuel cap and the error has come 2 times since that was purchased and installed.
I am putting the gas cap on so tight, that sometimes its hard to open again for the next fill up.