Question

2004 Ford F250 XLT 5.4L with code P0720, idles rough and stalls, when put in gear only code showing, is the P0720 output speed sensor circuit

Answer 1

Hi there,

With this code, you need to either replace the speed sensor or check the wiring. Here is some info for you.

P0720 FORD - Output Speed Sensor Insufficient Input
Read more: https://www.autocodes.com/p0720_ford.html

Answer 2

What the ECM does is look for open, short, grounds and rationality, P0720 will result in a harsh shift or abnormal shift, if this is the sensor, P0720 more than likely appears due to an internal mechanical transmission problem.

P0720 Ford Code - Output Shaft Speed Sensor Circuit Malfunction
Read more: https://www.autocodes.com/p0720_ford.html