My DAEWOO Matiz 2 CVT sensors appears on my dashboard and as if the car won't shift to next gear..last time if CVT appears, I just restart the engine and it disappears but now the CVT sensor always ap

Check your oil solenoids

I am going to assume you have the 1.6l engine because it is a pretty common engine for Daewoo. I had a 2000 Daewoo Lanos with a 1.6L engine. It has been quite some time since I had the vehicle but the cam position sensor was easy to replace. If you remove the plastic engine cover, then remove the valve cover, you will notice that on the left side of the cams near the timing belt that the sensor sticks up slightly and you can see the electrical connection to the sensor. I do not remember if I had to remove the timing belt cover or not but I don't think I had to. If I remember right, it was either one or two screws holding the sensor in place.

cvt transmission use a special and specific oil and it is not the same oil as used in conventional automatic transmissions
using the incorrect oil will destroy the cvt inside 10,000miles
get the oil from a service dealer or specialist transmission shop who is familiar with cvt transmissions

Clogged transmission filter. Time for a rebuild.

could be gear box. or trans filter not letting right pressure to shift. when was the trans mission serviced/?

The fact it only has a possible misfire in the first 3 gears,
tells you your under a high vacuum load getting up to speed
& applying more gas pedal command as well, until you let up
in top gear

Timing is engine load related, so your theory is not valid there either

I would do a cylinder leak down test to check the mechanical condition
of the motor,valves & such,then use an evap smoke machine to test
intake,exhaust & evap system for vacuum leaks

What about EGR System Even electronic ones use vacuum,thus
my vacuum load theory.

Get rid of all ignition misfire issues

No Vacuum Leaks anywhere on car

New upstream O2 Sensors or scope yours for
switching times

Check timing belt for issues

I guess you checked fuel pressure

Check alternator for bad diodes

Need a scan tool to look at fuel trim & all data
on a road test

Basically you missed something

the CVT light is associated with the transmission. I don't think changing the fluid/oil in the transmission will help. you need to find a shop that can access the transmission control module to fint out ant fault codes and go from there. could be a simple speed sensor or shift control solenoid.

What is a Matiz?? Remember we are a US based site.

I have ac compressor.and all spares of matiz.call 9096672837 or mail [email protected]

remove the outer small bolts to remove balancer(pulley) the big centre bolt holds crankshaft gear for timming belt which slides off with timming belt removed.