Car stutters in low gear or at low speeds, then the car acted like it would not get gas going uphill and shut off. When it was restarted i was able to drive it home. Had a check engine check transmission light. Error code is P0734 Gear 4 incorrect ratio. Is this a solenoid or a transmission problem? Car stutters only on hot days.
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P0734=A/T 4th gear incorrect ratio. This has nothing to do with the speed sensor. If the speed sensor was faulty, it would also set OTHER gear incorrect ratio codes. My experience tells me the 4th gear incorrect ration indicates the torque converter clutch (TCC) is slipping and nothing more. Unless there was a speed sensor DTC (Diagnostic Trouble Code), the sensor is not the issue (yet). The fact P0734 was set (trust the computer), the TCC is slipping (out of range). Question: Maintenance history may indicate the wrong transmission fluid may have been introduced. Hyundai's Transmission fluid is strictly SPIII... there is no substitute. The incorrect fluid will cause 4th gear slippage. Now, having said that, it doesn't mean the 4th gear (lock-up) clutch isn't worn out. Have a qualified/certified Hyundai Service Technician properly diagnose this issue.
Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)
Trouble Code Conditions: Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.
Customer may complain of intermittent 4th gear operation
O/D and 2/4 pressures less than 75 psi
O/D or 2/4 clutch volume indexes out of specification
O/D accumulator seals are damaged
Transmission enters "limp in" mode running in 4th gear
Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)
Trouble Code Conditions: Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).
Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
Transmission has internal problems or damage present
P0715 Input/Turbine Speed Sensor Circuit Malfunction
P0731 Gear I Incorrect ratio
P0732 Gear 2 Incorrect ratio
P0734 Gear 4 Incorrect ratio
It seems like you were having an issue with your transmission but if you cleared your light and it has stayed off I would just keep a close eye on it.
P0732 and P0734 indicates gear ratio errors in 2nd and 4th gears, basically no 2nd and 4th gear. The one thing 2nd and 4th gear has in common is the band, the band is known to break, this is a common failure with this transmission and happens on a regular basis.
P0733=Gear 3 Incorrect Ratio P0734=Gear 4 Incorrect Ratio, your transmission is in "limp" mode, Have the following sensors checked on the transmission,input sensor,output sensor,and speed sensor. The transmission is not getting a signal from one of them,So it doesn't know how fast your going so it doesn't up shift.