P0496 is evap emission is high purge flow fault, p0442 is emission control system( small leak) the meaning is about the same. check for a bad gas cap first. sometimes this will set a check engine light. loosen cap and see if this is the problem. if it is. usually if you turn cap only a little the light will go out. but if bad enough just change cap.
Hello
When the service engine
soon light (Also called the check engine light or engine management
light) is turned on this is to alert you to the fact that Powertrain
Control Module (computer) has detected a failure somewhere in the
systems it controls you may not feel any difference in the way the
engine runs, this can be the transmission or the engine or emission
system, there are fault codes set in the modules memory for these
faults. What needs to happen now is to have the powertrain control
module scanned with a special tool called an OBD2 electronic engine
control scanner or a OBD2 code reader. Once the code(s) are read then
you must perform the diagnostics for each code and make the
appropriate repairs based on the findings of the diagnosis that was
performed, this is called doing "Pinpoint" testing.
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