Question about 1999 Dodge Ram

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Idont know if the speed sensor is bad.


dont know if the speed sensor is bad

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Your engine wouldnt start an there would be no rpm showing.

Posted on May 14, 2009


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2000 ford f250 7.3 4r100 code p0720 changed the output shaft speed sensor and still getting the delayed shift and code dont know what to dob

bad connections, Definition of Diagnostic Trouble Code P0720 Category: Powertrain Definition: Output Speed Sensor CircuitNote: This definition of P0720 is applied to all manufacturers

Jul 23, 2015 | Cars & Trucks

1 Answer

Speed sensor

there are many on some cars 5 or more.
what engine,? what transmission?
1: crank shaft rpm CKP sensor.
2: VSS 1 tranny front sensor Automatics.
3: vss 2 tranny rear. """
4:speedo back up VSS to vss 1.
5: cam speed, or Angle.

why not say the symptoms and why VSS is on your mind.
did you use a scan tool, if not why not?
the scan tool will tell you which sensors readings are wrong
and just because one is, dont mean the sensor is bad.
the PCM /ECU never knows what is bad, ONLY what tests
failed (called monitors) and its the job of the technician
to do the FSM tests. and find TRUE CAUSE.

SCAN it and stop guessing, or go broke.

Jan 22, 2014 | 2008 Suzuki SX4

1 Answer

I have a 2002 honda 500 rubicon it is blinking three gears d1 d2 els all at once

the D lights blink for A/T failures
in the USA (are you) the first check is to scan it.
(and drive it checking for slip,flare or other symptoms)1st !!!
connect the scan tool 0bd2 and scan it for tranny errors)
if you read the FSM , it shows each step in sensor tests.
and lots of not..... (scope readings missing, bad bad bad)
first off , you need some facts:
if the scan tool shows the rear (wild guess) speed sensor reads wrong, do not think its bad, you fail to realize most failures
are the transmission slips (trans, is bad) and the sensor see this illegal
low rpm and trips a DTC for that.
most those sensors last forever,
THe ECU (PCM) never knows what is wrong, it only knows
what tests fail,.
The ecu knows the speed of the engine and the tranny speeds.
this is the TCM function (be it in a TCM box or in the PCM)
this TCM does all the shifting and monitors for errors.
The DTCs in many case should state, tranny slip or bad sensor.
and dont.
you didnt post the DTCs so can elaborate.
working the A/T with no FSM. is not going to work.
you need to read the on car service, and do the steps in the correct order. fiddling a sensor with a tranny with low pump pressure. is folly
so is same and the stall test fail. (1st tests both)
my byline:
"the PCM is dumb. it never knows what part is failed, ever.!!!"
think of DTCs as only clues, or 1 more symptom....

Nov 29, 2013 | Honda Cars & Trucks

1 Answer

There is massege in my ford 2006 (chek park assist ) idont what that main can any one help me

your expedition is equipped back up sensors af there is a problem with that system or one of the sensors is bad you will get that messege

Dec 12, 2010 | 2004 Ford Expedition

1 Answer

I'm coming up with codes Po700, Po732, Po605, Po720 when I run a diagnostic on my Dodge Grand Caravan Sport, 3.3, 6cyl. Could the TCM (Transmission Control Module)be bad or it just need re-flashing?

I dont think reflashing will help this, the first thing that comes to mind is the output speed sensor, i would replace the sensor and reset the codes and go from there, the out put speed sensor can make all this codes come up, the po720 is the out sensor, when this goes bad the trany doesnt know when to shift gear at the right time so if it shifts at the wrong time you get the other codes like the po732 2nd gear error or po605 internal trans controller, replace the sensor first and see what happens after that, good luck and hope this helps.

Jul 07, 2010 | 2002 Dodge Durango

1 Answer

Dodge deisel pu not charging regulator and alterenator ok help?

the biggest cause of that problem is a bad engine speed sensor {also called crank sensor but incorrectly] any way if engine speed cannot be read by computer then it wont ground the field, in other words it dont know the engine is runnig.
it is on the timing cover right on the edge of the balancer pulley
easy job and part is cheap to

Mar 18, 2010 | 1994 Dodge Ram 2500

1 Answer

Need a fuse box diagram for a 2000 f250

im assuming one has gone out and then another. it really sounds like the lock actuators have gone bad. slight movement is a common sign.

Nov 03, 2009 | 2000 Ford F250 Super Duty Crew Cabs

1 Answer

My speed sensor indicator stop working,

replacement of your speed sensor is your only option here,assuming connections have been checked and are good, idont know if you have kids but sometimes they get disconnected to hide extra miles put on the vehicle

If you need further help, I’m available over the phone at

Oct 03, 2009 | 1998 Volvo S70

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