Output Speed Sensor Location
#51
09-28-2012, 02:16 AM
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1999 Ram 5.2L 4x4 here, 140K miles. Just got a p0720 code and did a Google search and found this forum.
I've done most of my own light/medium mechanic work for 30 years, but this truck is new to me. Looks pretty simple to replace the output speedometer sensor.
But I have a couple questions. First, a couple symptoms. When I accelerate, my inside vents kick over to defrost, and when I take my foot off the gas, there's a slight popping sound (single pop) and the vents kick in again. Also, just after it threw the p0720 code, when in cruise it will occasionally bump up about 200 rpms for a second and then come back down to cruising speed. Sometimes it does this two or three times.
BTW, fluid and filter were fresh last year, about 10,000 miles ago. I have ABS but the ABS light is not on. No other lights are on, and p0720 is the only code being thrown.
So:
1. Is the p0720 code always the output speedometer sensor?
2. Would a faulty sensor be causing the goofy switch between vents and defrost upon acceleration?
3. Do I expect to lose some tranny fluid when I pull the old sensor?
Thanks for any help.
I've done most of my own light/medium mechanic work for 30 years, but this truck is new to me. Looks pretty simple to replace the output speedometer sensor.
But I have a couple questions. First, a couple symptoms. When I accelerate, my inside vents kick over to defrost, and when I take my foot off the gas, there's a slight popping sound (single pop) and the vents kick in again. Also, just after it threw the p0720 code, when in cruise it will occasionally bump up about 200 rpms for a second and then come back down to cruising speed. Sometimes it does this two or three times.
BTW, fluid and filter were fresh last year, about 10,000 miles ago. I have ABS but the ABS light is not on. No other lights are on, and p0720 is the only code being thrown.
So:
1. Is the p0720 code always the output speedometer sensor?
2. Would a faulty sensor be causing the goofy switch between vents and defrost upon acceleration?
3. Do I expect to lose some tranny fluid when I pull the old sensor?
Thanks for any help.
check valves,two of them from dealer,will cure vents switching. And yes you will get some tranny fluid on you doing output speed sensor, go fast with some cardboard down.
Last edited by ReadRam; 09-28-2012 at 02:22 AM.
#52
09-28-2012, 06:24 AM
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Output speed sensor
#53
09-28-2012, 09:09 AM
#54
09-28-2012, 09:25 AM
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#55
09-28-2012, 09:27 AM
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#56
06-10-2013, 10:18 AM
hello. I also have a 1999 dodge 318 5.2 engine, a transmission whith overdrive, and my check engine light is on, the code says that it is my output circuit speed sensor, and i would like to no what it is and where it is? and if anyone Knows the cost and how hard it is to repair? thank you
#57
06-10-2013, 10:30 AM
