2004 Jeep Grand Cherokee Q&A

2004 Jeep Grand Cherokee Question: I got the engine light on and I got two codes p0455 and p0442 what can I do?

It was happened might be 6 months ago but I didn't mention that until recently I bought a diagnostic test stuff and check it and found it is the emission or something problems, what can I do because I see the test method on the internet is extremely strict and annoying. -
Answer 1
Testing the evap system is the BEST way to get it right without wasting time and money on guesses. -
Comment 1
Is it just need to check the emission? Would it cost a lot? -
Answer 2
do the right thing and test properly or get it done to save time and money -