P0430 Chrysler -

Question

what is the best option you think I should try first fixing these two problems and should I get my sparkle plugs change to. Can you give me answer as soon as possible thanks.

Answer 1

has your car overheated? if not then the thermostat is stuck open so its taking the engine longer to get warm (setting off P0128)

start by replacing the thermostat 

 

for P0430 check for exhaust leaks, you can do any intake flush with sea foam to something else to de-carb the engine, if you have not replaced the spark plugs you can do so after the intake flush