What causes CO to be high in emissions?
Air Filter A dirty air filter will disturb the normal air / fuel ration and result in less than optimal fuel efficiency, consequently resulting in higher CO emissions.
What causes high HC and NOX?
Ignition defects including dirty spark plugs, leaking or open-circuited spark plugs or wires, or defective ignition coils can all result in a shortage of spark energy. Any shortage of spark energy may cause high HC emissions. If the spark occurs at the wrong time, incomplete combustion and high hydrocarbons may result.
When did the Toyota Previa stop being made?
The United States version of the Previa was discontinued after the 1997 model year, replaced by the more traditionally designed, front-wheel-drive, US-designed and built, Camry -based Sienna . The Insurance Institute for Highway Safety has given the Toyota Previa a “Poor” rating.
What are the trim levels of a Toyota Previa?
Trim levels were base (later renamed to i denoting an injection engine), GL, GLi and GXi. The 2.2-liter diesel version was a popular grey import . In Australia, the Tarago was offered in GL/GLI, GLS, and GLX forms with 7–8 passenger seating from 1991 models.
What kind of gas mileage does Toyota Previa get?
Gas mileage is below average (11-13L/100 km or 18.1–21.4mpg city, 10-11L/100 km or 21.4–23.5mpg highway); the small 4-cylinder engine needs to work a bit harder owing to the power to weight ratio of the vehicle, compared with today’s 6-cylinder engines. The addition of the supercharger slightly improves power and gives better fuel consumption.
Why did my car fail the emission test?
What is CO. My vehicle failed the emission test for high Carbon Monoxides. Why my car produced high CO. High CO failures explained. How can I lower CO. Common high CO failures. Common CO faults. Failed high CO. Failed high Carbon Monoxide.