What is the speed sensor circuit code P0720 and what problem is this?

Answer 1

I take that back with apologies. 0720 IS the output sensor, p0727 would be the input

From: Jim M. Auto Zone, NAPPA and Discount Auto Parts sells the Output Speed Sensor for about $16.00 or a little more. It costs $25.00 at the dealer. I checked the code myself, with my own code checker which is very inexpensive, when my engine light came on as my transmission hesitated between first and second gear.

I have a 1999 Dodge 1500 Ram van with a 318 Cubic Inch (5.2 Liter) engine with a four speed (Three speed with Overdrive), transmission. I have 138,000 miles on my van.

The sensor is located near the rear of the transmission on the driver's side and is easily accessible. All you need is a one inch wrench to remove it. The color may vary from grey to white, etc. The wire clamps on to the head of the sensor and comes off very easily. The sensor screws out very easily. When it is removed a small amount of Transmission Fluid may drip out. Replace the old sensor with the new one by just screwing it in and replacing the wire to the sensor.

Took my code reader and turned the code off. Drove the van down the road and had no problems with it after the sensor replacement. Transmissions shifts quite easily with no hesitation.

After doing some research, found out that the sensor checks the speed of the trans-axle to let the transmission know when to shift. If there is a short-circuit on that sensor, it does not tell the transmission to shift to the next gear and causes the check-engine light to come on. I got around the problem by pressing the accelerator more at first to make it shift, however, I also found out that if I manually shifted from 1st gear to second to third that also worked, until I could get to the auto parts store to buy the sensor. Remember, it is the Output Speed Sensor for the P0720 code.

Only took about 15 minutes to replace.

Thanks (jhmeeinc44@aol.com) thx all solutions the same on 2000 dodge dakota!