Why am I still getting codes p1529 and po734 after replacing tcm and imput speed sensor when the car warms up?

PO734 is Gear 4 Ratio Incorrect, slip detected.

Possible causes:

• Transmission Oil Level Low

• Output speed sensor problem

• Engine speed signal circuit between ECM and TCM: Open/Short circuit.

• Transmission Mechanical Failure.

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

P1529 means the TCM (transmission control module) has requested that the ECM (engine control module) turn on the check engine lamp. All I can tell you based on this information is that the TCM has seen something abnormal. To find out what abnormal condition the TCM saw, you'd need to retrieve the DTCs (diagnostic trouble codes) from the TCM. The most frequent culprit is either the input or output speed sensor, but there's no way to know whether they may be the issue without the TCM DTCs

hyundai accent codes p1529 and po734

dear friend-the code P1529 means transmission control module(TCM)-communication problem,so please look at the following items-wiring,tcm,ecm,
just a hint if the transmission is slipping then the tcm is getting the wrong information from the input and out sensors.

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.

First of all, these codes are what are called "Powertrain Trouble Codes' (that's what the "P" means P=Powertrain). TCM Request (Transmission Control Module = TCM). The request was to turn on the 'Check Engine" light.
P0720 - output speed sensor circuit malfunction
P0715 - Input speed sensor (turbin speed) circuit malfunction
P0442 - Evaporative Emission System Leak (Small Leak)
P0455 - Evaporative Emission System Leak (Large Leak)
Check fuel filler cap problems - for Evap Emiss leaks
Replace the pulse generators & have the trans fluid replaced/flushed.
The Main Catalyst System Efficiency Bank 1 Is P0420, not P0442
If you had P0420 code, the catalytic converter is shot... and that's an expensive component.

Still sounds like a bad output speed sensor - check scan the TCM for codes and see what you get. Also check the wiring at and near the output speed sensor connector.

P0715 is the imput speed sensor is open or shorted. The P1529 is the transmission control module(computer) requsting the check engine light to turn on. These sensors are prone to going bad.

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