Code 1574 and 0720,in any time the car not change to 2nd,the problem is the revolution speed senso?j

Does it change frequency when in different gears?
If you're going the same speed, does it happen at the same timing regardless of what gear you are in?
Does it happen with every revolution of the tires, or at some other rate? Every revolution of the tires would point to a CV joint or the differential.

Do a transmission fluid change. this could help. Next would be having the 1/2 solenoid replaced.( have the codes checked). Could be the EPC solenoid.

run fault codes and check for TCM operation. Change the oil and clean the filter. Have the bands and clutch packs adjustment checked while the pan is off.

Read car code by obd2 scanner at OBD Tools 365 Days Shop
It has many kinds of car diagnostic tool, get one for your car.

P0732 FORD - Incorrect Second Gear Ratio
Transmission in second gear and the ECM detected an incorrect gear ration. This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Hope helps.

The vehicle DOES NOT have a vehicle speed sensor (VSS) per se. It DOES however, have speed sensors - INPUT and OUTPUT speed sensors on the transmission. What was the check engine light?... what was the code?

On the 2002 Accent, these sensors cannot be gotten (purchased) separately. The two sensors are part of ONE wire harness and can only be acquired together as one complete unit/harness.

P0732 - Improper Ratio for Second Gear.
P0734 - Improper Ratio for Fourth Gear.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM as follows:

Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from ECM C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd and 4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

This malfunction will be caused when shift solenoid valve B is stuck open.

Gear positions supposed by TCM are as follows. In case of gear position with no malfunctions: 1 , 2, 3 and 4 positions In case of gear position with shift solenoid valve B stuck open: 4* , 3, 3 and 4 positions to each gear position above.

Symptoms: Engine Light ON (or Service Engine Soon Warning Light)

Diagnostic trouble code A/T 2ND GR FNCTN with CONSULT-II or P0732 without CONSULT-II is detected when A/T cannot be shifted to the 2nd gear position even if electrical circuit is good.

Possible Causes:
- Shift solenoid valve B
- Each clutch
- Hydraulic control circuit


Check it and tell us news.

This indicates a DTC Intermediate Shaft Speed Sensor "A" problem. Below are Possible Causes:
Open or short in transmission revolution sensor NC (speed sensor NC) circuit

• Transmission revolution sensor NC (speed sensor NC)
  
• ECM
  

If there is no check engine light on - check the transmission fluid by pulling out the dip stick (check the level and smell the fluid if it smells burnt, there is an internal problem with the transmission) if all this is ok then the problem may be one of the speed sensos or (pulse generators)

how i can solve gear problem like i want that speed of 1st shaft should be similar to he another one