Question

2009 Chevrolet Cobalt 2.2L with engine code P0442, what is the meaning of the code?

Answer 1

Hi there,

With this code the best method for diagnosing is to have a smoke test done. This will show the smallest leak, then you can repair the faulty component yourself.

Answer 2

P0442 CHEVROLET Code - Evaporative Emission Control System Leak Detected Small Leak
Read more: https://www.autocodes.com/p0442_chevrolet.html