I have a 0-300psi pressure sensor screwed into the port of my 4l80e. It worked fine for a while and recently, I updated the Holley software and changed a few things around. The car was also sitting for a while. Now, it is showing 300 psi all the time, even with the car off.

Any tips on diagnosing what the issue is? I can definitely buy another sensor, but I want to make sure that is the issue. Could I have set it up wrong in the Holley software so that it would show 300 psi? Thanks in advance for any help or advice!

 

Wiring is wrong. Check the pins on the connector

 

100%. Just wanted to update. I got the yellow output wire from the 12v-5v converter mixed up with the yellow signal wire from the sensor. Works great now. Thanks for your help!