Tagemissions system

Searching for emissions system info? Check out all the emissions system related articles here on the NAPA Know How blog. We’ve got Know How for all!

Posted December 9, 2019 Know How

What Is a Canister Purge Solenoid?

What is a canister purge solenoid, how is it connected to the EVAP system and what are the signs yours might be failing? Learn more here.

Posted November 15, 2019 Maintenance

Dealing With Ford P0401 Code Issues

The Ford EGR Pressure Feedback system is known for persistent P0401 EGR low flow code issues. Bear in mind, low flow can be caused by several issues. The most common … Continue Reading Dealing With Ford P0401 Code Issues

EGR Valves And Coolers Are Core To Maintaining Clean Diesel Emissions

Posted June 10, 2019 Maintenance

EGR Valves & Coolers Are Core To Maintaining Clean Diesel Emissions

It used to be when you heard someone say “diesel,” the word “dirty” was usually in close proximity. Those were the old days. Today’s modern diesel engines, including those found … Continue Reading EGR Valves & Coolers Are Core To Maintaining Clean Diesel Emissions

A car's exhaust system. A catalytic converter plays a major role in a car's exhaust system and when it goes bad, it can wreak havoc on your car's performance. Here's how to diagnose a bad catalytic converter.

Posted March 8, 2019 Know How

Worn Out Catalytic Converter? Here’s How to Know For Sure

A bad catalytic converter will fail to transform dangerous exhaust gasses and feed back pressure into the exhaust system. Here’s how to diagnose it.

Posted February 14, 2019 Know How

Can You Clean an Oxygen Sensor?

An oxygen sensor is an important part of your vehicle’s emission control system. Can you clean an oxygen sensor or should you replace it?