Hi. I have 2011 Fiat Punto 1.4 8v. (Dualogic Transmission). I have a weird problem. P0720 code. While driving my car at "only" 90 -95 km/h speed "check transmission fault apeears on the screen and couldn't get 5th gear because of this. If i slow down (under 90km/h) i can get 5th easily using manual option (i mean tiptronic) I changed the oss (on transmission) 2 times but nothing changed. I checked the abs whell sensors and i think they are working. My speedometer is working normally.i changed the clutch kit. Why i see this fault at always same speed? Please someone help me.

This says it is one or the other.

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sounds like a vacuum leak to me i would check with engine started and in park get some carburator cleaner and spray it all around the intake where you see small lines hooked up to it

Service the brakes and ABS .

go to auto shop and look at their chillton manual on it or find your fuse box it may tell you.

I have a 98 punto sporting nd today it started running like it was misfiring but wen i accelerate slow its fine but wen u accelerate as normal it spits and splutters :'( any suggestions??i have change fuel filter nd injectors ????

There are no fluids consumed in any motor vehicle

If you need to add to any fluid, you need to make a
repair, for a leak

Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

run the fault codes
could be bad injectors , crank position sensor or cam position sensor problems

On this website (link below you find fuse box diagram and description for:

Fiat Punto mk2

Fiat Punto mk2 Classic from 2004 fuse box diagram Auto Genius

Fiat Strada FL
Fiat Strada mk4 FL from 2011 fusebox diagram Auto Genius

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.