Three of the main reasons the check engine light or malfunction indicator lamp (MIL) turns on are: a loose fuel cap, issues with the ignition system, and problems with the emissions system. Many emissions system issues can be traced back to contamination, especially in vehicles regularly driven short distances, filled with poor-quality fuel and not properly maintained. Common codes for these issues include P0420, P0421, P0430 and P0431. These issues can often be addressed by simply installing Rislone Cat Complete Fuel, Exhaust & Emissions System Cleaner (part #4720). Cat Complete cleans and restores the entire fuel, exhaust and emissions systems, clearing P0420 and related OBD codes, and turning off check engine lights without a trip to the mechanic.
Three of the main reasons the check engine light or malfunction indicator lamp (MIL) turns on are: a loose fuel cap, issues with the ignition system, and problems with the emissions system. Many emissions system issues can be traced back to contamination, especially in vehicles regularly driven short distances, filled with poor-quality fuel and not properly maintained. Common codes for these issues include P0420, P0421, P0430 and P0431. These issues can often be addressed by simply installing Rislone Cat Complete Fuel, Exhaust & Emissions System Cleaner (part #4720). Cat Complete cleans and restores the entire fuel, exhaust and emissions systems, clearing P0420 and related OBD codes, and turning off check engine lights without a trip to the mechanic.