Question about 1999 Jeep Grand Cherokee

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Transmission won't shift out of 1st gear

99 JGC Laredo 2wd w/ 4.0L -- transmission stuck in first gear. Computer error code stated bad output speed sensor. Got one from the part store... could fine it on the transmission so I referred to the manual only to find out that 99 & later models aren't equipped with mechanical speed sensors.... does any one know what i'm supposed to change or do??? please help!

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The output spped sensor is on the drivers side rear of the transmission case..its a 2 wire connector..the wires are dark bluewith a black tracer and light green with a white tracer

Posted on Oct 01, 2008

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MY JEEP LIBERTY WILL NOT SHIFT OUT OF LOW


wow no year stated, its 1996 and never but how new
its a KK or KJ jeep 2002 to now. 14 years of jeep.
as is what transmission used, and if 2wd or 4wd.????
first the p0700 code
ONLY, means
1: SCAN TOO you using is junk, and old,
or
2: means the TCM needs to be scanned by self. to see all codes in the TCM.

my guess is you need a real scantool..

700 means, trans has errors, stored, ASK IT NOW.

1: fuses good,
2: is TCM plugged, in? some Liberties have seperate PCM and TCM.
3: the TCM most see all sensors working (where ever it hides)
if not , it will not ever upshift.
speed sensors dead, or not plugged in?
PCM cant talk to TCM.// oops....
and more.
the problem is your tools, (missing a real jeep scan too)
my INNOVA 3160 can see those errors, but ive never done a liberty, in fact i don't consider it a real jeep.


The TCM is JUST a computer (a simple microprocessor)
it has inputs and outputs (shift solenoids)
if the inputs lie, it can not shift or shifts wrong, or goes to limp home and skips gears.
all TCM work like that, and not scanning it is a FAIL.

you must scan it fully. to get all CODES.

Dec 02, 2015 | Jeep Cars & Trucks

1 Answer

1999 jeep Cherokee classic. It will not go into 1st gear. It says it is the input speed sensor. Check gauge light comes on now. I replaced the alternator , input speed sensor and battery. Its over c


It says ? what says? the SCAN TOOL>?

non GRAND, (no engine stated, so fail there 1st)

my guess is you have a DTC and forgot to post that. why do that?

the DTC is covered in the FSM manual, and shows what is failing.

why not read the FSM and do what it says to do?



ill no attempt to read the FSM for you,. and that vague error.

why not log in to alldata.com and stop guessing. at parts.

there is no reason to gue$$



my guess at he DTC,

P0500"

or was it the P07xx series, all A/T errors.



P1xxx codes are factory code, got them? need all codes, not just 1 of many. and using a real scan tool not some POS autozoned junk (free)



p0500 is ASE jargon (best ) is VSS sensors.

vehicle speed sensor.



the transmission TCM monitors many inputs, and if they are bad

it can NOT shift, one such sensor is SPEED. MPH or VSS

the tail shaft all all 42RE transmission has a tail rpm sensor

when dead the cars speedometer goes dead, and the TCM

is at a lost to shift to 2nd gear, if speed is 0 all day.

a hopeless deal there.



if the battery voltage is not over 15v, its not overcharging, running.

99 is a nice jeep, id fix mine, ive had many.



the tranny has 2 speed sensors.

the front sensor does not do MPH, its just engine tranny input RPM

there are 3 RPM sensor

Engine, RPM called, CKP

tranny input sensor that tells the TCM true clutch slip at all time

and if the TCC works or not.

the tail shaft is the true speed sensor, vehicle speed, it\'s on tail shaft.



my guess, is the tail sensor is bad and you replaced the front sensor

P-0715 is a bad input sensor

P0720 and up are output sensor errors.

the 500 , is the 3rd sensor, the tail shaft sensor that runs the speedo

1st google hit.

http://www.jeepsunlimited.com/forums/showthread.php?548105-P0500-Vehicle-Speed-Sensor-Malfunction



next time post real DTCs

so we can jump on the exact part and the simple tests





the beauty of 3 sensors, is the transmission runs better

shifts better

and the OBD2 diagnostics are dead nuts, accurate.

it can see illegal gear slips (bad clutch packs) in any gear

and tell you. one of the best there.are

if you had new car, with 9speed, good luck keeping that card house going.. really.

Sep 26, 2014 | 1999 Jeep Cherokee

1 Answer

95 jgc starts then stalls


Take it to a properly qualified and licensed mechanic you know and trust.

Nov 10, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

P0720 stratus codes


code p0720 refers to output shaft speed sensor(OSS)--circuit malfunction====causes--wiring--OSS sensor--ECM/TCM
of it has just happened check the wiring and connections to the transmission for water and corrosion or replace the OSS sensor in the transmission.

May 08, 2013 | 2002 Jeep Liberty

2 Answers

Po720 code and po733 code plus leaking oil


P0720-OUTPUT SPEED SENSOR ERROR

WHEN MONITORED
The transmission gear ratio is monitored continuously while the transmission is in gear.

SET CONDITION
If there is an excessive change in output RPM in any gear. This DTC can take up to five minutes of problem identification before illuminating the M.I.L.

POSSIBLE CAUSES[*]Output speed sensor signal circuit open[*]Speed sensor ground circuit open[*]Output speed sensor signal circuit short to ground[*]Speed sensor ground circuit short to ground[*]Output speed sensor signal circuit short to voltage[*]Speed sensor ground circuit short to voltage[*]Output speed sensor[*Powertrain Control Module (PCM)[*]Intermittent wiring and connectorsi cen get you a full flow chart on how to check it out if you wish

p0733 Gear 3 Incorrect ratio

Jan 03, 2011 | Chrysler Voyager Cars & Trucks

1 Answer

I have a 96 Jetta that is stuck in 1st gear. The linkage cable is working but the car wont go outta 1st!


The transmission is shifted with a computer. The computer needs input signals in order to make a shift decision, There are three speed sensors (input,output,and vehicle speed) that must work for a shift to be comanded. I wouldrecomend you sheck for stored codes and check the vehicle speed sensor.Is the speedo working?

Oct 07, 2010 | 1996 Volkswagen Jetta

2 Answers

My 91 dodge stealth is in limp mode how do i fix this transmission problem


Your car is in "limp"mode because the computer doesn't know what speed your doing,So it doesn't shift,
There are three possible reasons for this,
#1= input sensor faulty on transmission,
#2=output sensor faulty on transmission,
#3=speed sensor faulty on transmission,
you need to have the transmission codes read to know which one,Autozone checks codes for free.

Jan 13, 2010 | 1991 Dodge Stealth

1 Answer

Check engine light with following codes p 1529 p0720 p0715


P1529 indicates that your TCM asked the ECM to turn on the check engine lamp.

The range switch and the output speed sensors are the items that are abnormally affecting the operation of the transmission. The diagnostic logic in your computer can distinguish these issues from one another, so you'll definitely want to do both. You have no diagnostic code for the input speed sensor (P0715) listed, so I have made no recommendation to replace it. In my opinion, it's not a labor-intensive repair, so I wouldn't recommend replacing it unless you have reason to believe it's bad.

DTC - P0720 (OUTPUT SHAFT SPEED SENSOR SYSTEM)
Code No. P0720 Output shaft speed sensor system
If the output from the output shaft speed sensor is continuously 50% lower than the vehicle speed for 1 second or more while driving in 3rd or 4th gear at a speed of 30 km/h or more, it is judged to be an open circuit or short-circuit in the output shaft speed sensor and diagnostic trouble code No. P0720 is output. If diagnostic trouble code No. P0720 is output four times, the transmission is locked into 3rd gear or 2rid gear as a fail-safe measure.
Probable cause
Malfunction of the output shaft speed sensor
Malfunction of the transfer drive gear or driven gear
Malfunction of connector
Malfunction of the TCM

DTC - P0715 (INPUT SHAFT SPEED SENSOR SYSTEM)
Code No. P0715 input shaft speed sensor system
If no output pulse is detected from the input shaft speed sensor for 1 second or more while driving in 3rd or 4th gear at a speed of 30 km/h (19 mph) or more, it is judged to be an open circuit or short-circuit in the input shaft speed sensor and diagnostic trouble code No. P0715 is output. If diagnostic trouble code P0715 is output four times, the transaxle is locked into 3rd gear or 2nd gear as a fail-safe measure.
Probable cause
Malfunction of the input shaft speed sensor
Malfunction of the underdrive clutch retainer
Malfunction of connector
Malfunction of the TCM

Is needed replace.

Nov 04, 2009 | 2001 Hyundai Elantra

1 Answer

Transmission code error P2716


The computer wants to know if the transmission is working properly. So it reads the speed of the input shaft and compares it to the speed of the output shaft. It knows which gear you're in because it commanded the transmission to shift into that gear. The turbine speed refers to the torque converter. That's the device that transfers power from the engine to the transmission. Think of two fans facing each other. Turn on one fan and the blades on the other fan will spin. The fan that ISN'T turned on is the turbine. So, with the input shaft or turbine speed, the gear selection, and the output speed, the computer can calculate how efficiently the transmission is working. If the speed is off, it knows that something is slipping inside the transmission. It can then try to boost the fluid pressure to compensate. If that doesn't work, it sets a different trouble code, usually a P0716 code means that the computer has detected a value for the input sensor that's either out of range (way too high or too low), or there's a circuit issue (bad wiring, etc. Should probably get it to a repair shop ASAP before damage is done.

Sep 19, 2009 | Toyota Corolla Cars & Trucks

1 Answer

Santa Fe Code p1529


I am sorry the above codes is general error code , the error your getting is car specific hence the codes where not there in the list:

P0715
Input speed sensor system

If no output pulse is detected from the input shaft speed (PG-A) sensor for 1 second or more while driving in 3rd or 4th gear at a speed of 30 km/h or more, it is judged to be an open or short circuit . In the input shaft speed sensor and diagnosis code P0715 is output. If diagnosis code P0715 is output four times, the transmission is locked into 3rd gear (D range) or 2nd gear as a fail-safe measure

P1529
TCM MIL request signal, this code sets in the computer engine control module when there is a transmission fault code

Jul 08, 2008 | 2001 Hyundai Santa Fe

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