Why didn't you google your codes & read up?
The 302 is a cylinder misfire
The 431 is a worn out or ruined exhaust converter from the misfires
The 734 is a 4th gear incorrect ratio-mostly a failing trans
I would suggest we go no farther & you part with it while you can
If you had no trans issues-- I would say you have a neglected but
fixable car
With the cost of trans repair & a 2003 wouldn't spend any money
on it
SOURCE: 2002 hyundai accent codes p1529 and p0734
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
SOURCE: 2003 santa fe with engine code p0431 is related to
Go to your local autozone store and have them check the the code and tell you what it means. They do this for free in hopes you'll buy the parts from them.
SOURCE: 2002 hyundai accent.transmission works great
Hi
Well two of the tranny codes ; P0734 and PO732 indicate gear 2,3,4 ratio incorrect. This can be caused by poor readings at the input and output speed sensors or pulse generators. The P1709 code is in reference to the kickdown servo switch.
Replacing the pulse generator set and TCM reprogramming( as per TSB) may solve your problem, otherwise you have a major component failure in the transmission unit. I would get some line pressures at the transmission checked first.
Sounds like the transmission is in fail safe mode, this happens when there is a transmission fault, you only have two gears 2nd and reverse.
Hope this helps - Steve
SOURCE: What does "EGR Error" OBD11 code 01 2D mean for a
You have to change the EGR valve. (exhaust gas recirculating valve) It's giving wrong parameters to the ECU.
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