My gf's Megane has just begun acting like a dog.
I recentley did a full service (all filters, oil
, plugs, etc) and yesterday we set off on a run. All going well until out of the blue, there was a "clonk" and the auto box shifted down into 3rd on the motorway.
We pulled over and since then the problems got worse. We nursed the car home and it constantly changed up and down from 3rd / 4th.
It then began to start cutting out at traffic lights, and the ecu
and stop lights would flash on with the car going into limp mode. No gearbox light came on.
I took it to a independant dealer who read the ecu
DF013 Injection / Auto trans interface
DF038 Downstream O2 sensor
DF018 Upstream O2 sensor
from the engine
7G Loud potentiometer circuit
11D Inj - At connection
12D Engine speed (emitted by injection)
from the box.
He cleared these. I also mentioned that I suspected the cranksensor was on its way out due to a few hotstart problems we have had.
I replaced the sensor when I got home, and took it out for a test.
From initial start up, there was a strange buzzing / whirring coming from the autobox, like an electrical noise??
It reversed ok, but upon selecting drive, the indicator didnt display drive and on setting off, it felt underpowered and snatchy, as if the clutches were slipping and catching??