my 2003 Honda Civic Lx failed inspection because of Carbon Monoxide 1.29% and Hydrocarbon 533.64ppm is there something that I can buy ? what should i do
Is the “check engine” light on?
High carbon monoxide and unburned hydrocarbon levels are incomplete combustion of the gasoline. Causes can range from the need for a long overdue tuneup to a sensor gone bad to a leaky injector.
Start by seeing if any codes are stored. Post back with the results.