Quote:
Originally Posted by JennyPescud
What does Transmission Limited Function indicate what is wrong? MONDEO MD auto
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On the MD quite a few things can cause the "Transmission limited function" message. Most of them will be transmission related, obviously.
But there's one I've seen which was due to a failed cooling water pump in the engine! That's something to be aware of too, from about 160,000 km up, it's possible for the coolant pump impeller to separate from the shaft. It can stop pumping coolant altogether!
Obviously the engine will overheat quite quickly if this happens. But the temperature guage can be indicating cold!
From my understanding there seems to be more than one coolant temperature sensor.
The sensor connected to the temperature gauge is in the downstream part of the thermostat housing. If there's no coolant circulation, the hot coolant doesn't actually get to that sensor. Luckily the Power train Control Module gets temperature data from another sensor and will set off the high coolant temperature alarm and put the engine into limp mode. All while the temperature gauge is showing a cold engine!
And the discrepancy between these two temperatures will trigger a bad
PCM data alarm in the transmission control module, and put it into limited function mode!
Modern technology is great eh?