Has this happened to you? You or someone else did a routine check or replacement of your car's air filter and then your check engine light came on a short time later. Using a code reader revealed one or more codes that indicated problems with the emission control system.

Potential solutions to those codes can be expensive. However, when you get a combination of codes such as P0440, P0441, and P0446, you may be experiencing a simple vacuum leak as a result of knocking off a hose while removing the air filter box. This is a common problem and is easy to fix.

This was the case with a 2002 Toyota Highlander as described in this short DIY video. It shows the specific cause and the simple solution.

свернуть