Hyundai Trajet automatic output speed sensor problem

Check for codes....might be throttle position sensor.

code P0732 - gear 2 incorrect ratio possible cause solenoid or related pressure switch is damaged or failed. problem related to the input speed or output speed sensor.low reverse clutch is damaged leaking or failed.faulty valve body. transmission fluid level incorrect or level is too low. code P1529 -

code p1529 refers to transmission control module-communication===causes --wiring-TCM and ECM
code p0723 refers to output shaft speed sensor (OSS)-circuit intermittent==causes--wiring--poor connection--OSS sensor --ECM /TCM
n both codes the TCM shows and the wiring may be a loose /dirty connection at the gear box level

This may not be your problem but it does bring the vehicle in fail safe you may have a warranty
Group TRANSAXLE
Number 09-AT-016
Date AUGUST, 2009
Model
1999-SONATA
2001-ELANTRA, SANTA FE & XG
2003-TIBURON
2005-TUCSON
2006-AZERA
2007-ENTOURAGE

Subject
AUTOMATIC TRANSAXLE DIAGNOSTIC TROUBLE CODES P0715, P0716, P0717, P0720, P0721 & P0722

An improperly functioning input speed sensor or output speed sensor may result in the following conditions:
^ "Check Engine" light on
^ Harsh P-R or P-D engagement shock
^ Transaxle in 3rd gear fail-safe
^ Diagnostic trouble codes 1. Using a GDS, check for DTCs in both the "Engine" and "Automatic Transaxle" menus. Record the DTC and description.
2. From the GDS, select:
^ Vehicle
^ "Auto Transaxle" menu
^ "Current Data"
^ "Input speed sensor" and "output speed sensor". Drive the vehicle and monitor the input and output speed sensors. If the sensors show:
^ Continuous output, the wiring currently has no open/shorts. Go to Step 6.
^ No output, go to Step 3
3. Check the wiring harness visually for an open circuit or short circuit to ground. Check for a pinched harness at the PCM/TCM attachment bolts.
4. Disconnect the connectors at the input and output speed sensor and PCM/TCM. Check for bent pins or pins not fully inserted into the connector.
5. If a harness open/short is found, repair or replace the ECM control harness between the PCM/TCM and transaxle and go to Step 8. If not, go to Step 6.

97 c1500 or k1500,. not told. just 1/2 ton sure. K1500 is 4wd got that?
the 4wd sensors are not the same. ok? no engine told either, guess 4.3L only
4L60-E; 4 speed Automatic trans. or 4L80e
that is and E box, electronically TCM shifted.
and the speed sensors must all work!! must !
it it can not shift correctly.
that is a fact.
you replaced 1 but never say the speedo was fixed, yes the speedo matters
OD is 4th gear,
the TCM can be scanned, why not do that?
stuck in 2nd gear is common for TRANNY LIMPHOME
it does that when sensors or solenoids go bad.
making car safe to drive to a shop only that is all limphome means just that.
beats a 100% dead car no? for sure.

sensors all 2, input speed and outputs speed, and if 4wd OSS is on the rear of 4wd transfer care, moved, for 4wd.
solenoids not bad in box. 1>2 and 2>3 shift and 3<4 shift.
scan the TCM.

the ECM on the car 4.3L runs the Tranny (TCM logic) 12 connection.
so not scanning the ECM OBD2 port ,you fully miss the boat and it sailed
the good ship of facts gone. DTC errors for sure missed.

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.

Go to http://www.hmaservice.com/ and register (vehicle by VIN). Afterward, you'll have access to technical information (manuals, wiring diagrams, service bulletins, etc) about your vehicle.

I have a 2002 Hyundai Sonata and I had the same problem. But mine would always shift into 3rd gear and STAY there until I turned the car off. I took it to a Hyundai dealer and he had to rewire a speed sensor on top of the transmission. Apparently a little animal got up in that tight little spot and gnawed on my sensor wires. The car has run fine since. To make a long story short, it might be your speed sensor on your transmission.

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

P1723 A/t control relay - Stuck on.
This Code is showing that the main control relay of the transmission is stuck on. When that happens transmission goes in to the fail safe mode which is being stuck in 3rd gear to prevent damage to the transmission