I have two codes showing on my daughters 2002 hyundai, P1529 and P0734. What should I look for to repair these problems

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P0734 is a gear ratio code for 4th gear. In other words TCM sees 4th gear is slipping. P1529? I don't know I'm on my cell phone.

Sounds like the transmission is trashed to me. You might try flushing the transmission fluid a couple times to see if that can help the problem (I would have it done with an actual transmission flush machine)

Other than that, all I can say is DIG DEEP my friend!

Code 0734 : Gear 4 Incorrect Ratio. you may wanna take back to the Mechanic and tell him whats going on and let him deal with that. Good luck

Sounds like a dirty of faulty speed sensor. They can be removed and cleaned. Better off replacing. Do check the wires to the speed sensor. Trace wires from tranny to instrument cluster and make sure they are all in tact and clean.

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.

P0734 - 4th gear incorrect ratio. P1529 Malfunction Indicator Lamp Request. Problem is in the transmission.
Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.

P1529 means nothing more than the TCM (transmission control module) has requested that the ECM (engine control module) turn on the check engine lamp.
P0734 basically indicates that your transmission is slipping.
You need to take this car to an authorized repair center for hyundai cars. Replacing the filter and fluid on the transmission might save this transmission but I would be willing to bet that a total transmission rebuild is in order.

Good Luck