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Discussion Starter #1 (Edited)
Hi everybody! New to the forum, glad to see there is such a community!

I happily own a 2015 QV TCT that had no issues whatsoever. A couple of days ago I made a stupid mistake - put the car in park while the car was moving (albeit slowly). I was coming to a stop and as a reflex I put it in park before being fully stopped. Reflex move as I also drive a manual and this is what I would do to put it in neutral. Anyway, there was a bit of a knocking noise for a split second and I did get an operation not permitted message on the dash. In the split second it took me to realise the mistake I hit the brakes hard and the car stopped immediately. I don't think the pin that slots in when in park mode is completely broken since the car stays put when in park BUT I did lose the pre-fill of the brakes in dynamic mode. The brakes fill soft as in neutral mode, the hard initial bite is not there anymore. Any ideas if this is a software issue? I have the car for a year and I only MOTd it locally (no major works/service so far) but I did get in touch with a couple of Alfa specialists in Hertfordshire today to book the car for a check-up for the first time since I bought it (first time Alfa owner).

Thanks for any insights!!
 

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Discussion Starter #3
Over complicated? Maybe you’ve bound the brakes slightly when you slammed on?
I wouldn't think so, I didn't brake that hard and the car wasn't moving that fast either, maybe 5-10mph? Not sure if the computer is preventing the pre-fill for some reason (thinking something is wrong). I'll try with an OBD reader I happen to have lying around.... Not sure what I should expect to find as I have never used the reader before!
 

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Mine's the 1.4MA TCT 2015, so standard brakes... I've never noticed any difference in the feel of the pedal between Natural and Dynamic modes (or All Weather, which also enables the pre-fill according to the display).

What does pre-fill actually do? Is it that it takes out any free travel in the pedal (wouldn't that wear the brake pads) or is it that it detects a sudden change of pedal from accelerator to brake and uses that to engage the brakes harder and faster than they would have done just from the pedal action?

It's a shame Dynamic doesn't reduce the hazard-warning-light-on-hard-braking sensitivity. Some journeys (country lane to work, when it's warm and dry out...) the hazards can be on quite often.

Dom.
 

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Discussion Starter #5
Mine's the 1.4MA TCT 2015, so standard brakes... I've never noticed any difference in the feel of the pedal between Natural and Dynamic modes (or All Weather, which also enables the pre-fill according to the display).

What does pre-fill actually do? Is it that it takes out any free travel in the pedal (wouldn't that wear the brake pads) or is it that it detects a sudden change of pedal from accelerator to brake and uses that to engage the brakes harder and faster than they would have done just from the pedal action?

It's a shame Dynamic doesn't reduce the hazard-warning-light-on-hard-braking sensitivity. Some journeys (country lane to work, when it's warm and dry out...) the hazards can be on quite often.

Dom.
I did an OBD scan and I got no fault codes back. I always drive the car in Dynamic mode and the brakes had a very strong initial bite to them which after this incident is not there anymore. Not sure if it is a Placebo effect though. I booked the car for a quick check with Alfa Workshop in Hertfordshire to see if something is going on.
 

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Probably paranoia?

The pre-fill really only works if your hard on the throttle then lift, and its only really noticeable as its dragging the brakes so you have more heat - its still the same pads pressing the same discs there is no magic increase in braking power.
 

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Discussion Starter #7
Probably paranoia?

The pre-fill really only works if your hard on the throttle then lift, and its only really noticeable as its dragging the brakes so you have more heat - its still the same pads pressing the same discs there is no magic increase in braking power.
Not sure, before that the brakes would grab the moment you touched the pedal. It actually made for a very uncomfortable stopping at low speeds if you were not used to it. It wasn't very progressive. Now it feels smoother. However although the car brakes for sure as it is, I've lost a bit of confidence (did I break something?). I've seen other posts in the forums talking about "French" brakes.... it could be that something else was going on altogether. Before buying this particular car I did test drive a similar one and it also had the aggressive bite... so not unique and therefore now that it is missing I am suspicious.
 
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