azimuth

Today I experience a p0191 code which is a fuel rail pressure sensor code when my check engine light came on. I came about this when I got in my truck after work and it hard started then stalled. After looking around at everything I decided to unplug the electrical connection on the fuel rail pressure sensor and try to start it . It started granted it was still running rough but not as bad as before and would actually stay at idle.

Once I did this I went to oreillys to pick up one for 114 bucks . But I plugged it in and it worked.

While looking around the forum for a solution before I unplugged the sensor almost everything led to fuel pump or the fuel pump driver module
So I figured I'd post this on here to help the next person it happens to.

The sensor is located on top of your left bank fuel rail and has two 8mm bolts an electrical connection and also a vacuum line attached.

bourgeois1269

I had the same problem and purchased one from oreillys for the same price but definitely check your fuel pump driver module. It's right above your spare tire.