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2001 1.6 Megane auto box problems

Engines


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Old 25th October 2009   #1
Kieranzxt
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2001 1.6 Megane auto box problems

Hi,

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.

He got:-
DF013 Injection / Auto trans interface
DF038 Downstream O2 sensor
DF018 Upstream O2 sensor

from the engine

and :
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??

Any ideas???
Currently in Kieranzxt's garage:
2001 Megane 1.6 16v RXE Auto
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5 Lastest Threads by Kieranzxt
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What model gearbox?? Transmissions Donald 1 540 25th October 2009 08:46 PM
2001 1.6 Megane auto box problems Engines Doug Sinnott 1 2204 25th October 2009 03:00 AM

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Old 28th October 2009   #2
Doug Sinnott
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Auto box

Quote:
Originally Posted by Kieranzxt View Post
Hi,

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.

He got:-
DF013 Injection / Auto trans interface
DF038 Downstream O2 sensor
DF018 Upstream O2 sensor

from the engine

and :
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??

Any ideas???
Independent garages don't really have the specialist diagnostic equipment required to isolate,or repair the fault,as Renault have.

My Renault 55 1.5 dci Estate got stuck in 3rd gear 9 months ago on the motorway.
I booked it into the Renault dealer who quickly located a faulty gearbox sensor,and repaired it (Renault went half,as it was a known fault ).
It's been fine since,much easier than a manual box!
Moder gearboxes are efficient things,but very complex,and NOT for the DIY mechanic.
Currently in Doug Sinnott's garage:
Renault Megane Sport Tourer 1.5 Dci 2005
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