Chevrolet \ Daewoo Kalos speedmeter problem

[barth71]

Hi
I have a problem with speedmeter in Chevrolet Kalos 2007y.
The speedometer lowers the speed.
For example, when driving 100km / h the speedometer shows 60km / h.
Diagnostics does not show any errors. In the ABS parameters, the speed is OK. However, in the engine's ecu parameters it is the same as on the speedometer.
I replaced the speed sensor on the gearbox. I checked the wiring. I took the gearboxes out and checked the sensor's gears. OK.
Has anyone encountered a speedometer fault in these cars? Only why even as a detachable counter and drive it the ECU engine controller shows low speed ???

[autoden]

Have the wheels or tyres been changed?

[barth71]

Thanks but the tyres and wheel are correct for this model. This is not the problem.

[bidu20]

If you stand still is the pointer to zero or below?

[autotrans]

some years ago I had a Toyota in the workshop, the transmission was late changing gear right across
the range no fault codes stored. wasted a lot of time on speed sensors throttle pots ect. while out on
road test I noticed launch was reading 50 MPH and the speedo was reading 50 . the difference one
was MPH the other KPH, turned out to be a Japanese import with some gismo fitted behind the dash.
wondered if there if there was a connection