Diagnosing a TPS failure in a Subaru legacy. After doing the "secret handshake" I determined I have a code 31 failure which means the throttle position sensor. Here is the procedure from Subaru to check the sensor for proper operation. After replacing my sensor the code is gone and the car operates great. Find the troubleshooting procedure online or go to your dealer (that's what I did).
![](https://i.ytimg.com/vi/x6c6zGUW2NY/maxresdefault.jpg)