Reply To: Code P0420

#7121

jlkwiththree
Participant

Try this – it worked for me. With about a half tank of gas, put in a gallon of acrylic paint thinner. Then take it on a non-stop drive of about 100 miles. I did this a few months back on my way to Hilton Head and it took care of the code, made the engine run better, and I am now getting about 1 MPG more. Amazing.