Code P0720

WOODSCABI

MEMBER
2013 FORD EXPEDITION
5.4L
V8
2WD
AUTOMATIC
160,000 MILES

Output Speed sensor not efficient. Cluster dash goes crazy. When restart the engine runs well for a while.

Monday, November 15th, 2021 AT 2:06 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Hi,

The code is indicating a variation between the output speed sensor and the actual speed of the sensor.

What I would start with is this. If your scan tool has live data, drive the vehicle and compare the actual vehicle speed to the OSS. They should be the same.

Let me know what you find. Also, I have attached a pic below indicating the possible causes of the issue. Let's start with comparing the speed sensor to the actual speed to determine if there is a difference.

If your scanner can't read live data, please let me know.

Take care,

Joe

See pic below.

Image (Click to make bigger)