Brake hold doesn't like a particular hill

[Tony7Bear]

There's a junction that I drive through once a week or so and it's got a decent gradient, maybe 15 degrees or so as a rough estimate. It's quite a busy 4 way junction and most times I get caught at a red light there and I'll be facing up the hill at the time. For some reason the auto-hold/brake kick down function (or whatever the correct name is!) usually takes several stabs on the brake pedal to get it to work, can anyone suggest why that might be?

 

[Bayleaf]

Might be your auxiliary battery starting to fail if your car has one or the main battery getting tired. If you can't check them yourself a trip to Halfords might be your best bet.

 

[E55BOF]

Do you have large feet? It might just be that as you stab at the brake pedal, you're getting a very slight touch on the throttle pedal, which will stop the hold engaging. Don't ask how I know...

 

[Tony7Bear]

Might be your auxiliary battery starting to fail if your car has one or the main battery getting tired. If you can't check them yourself a trip to Halfords might be your best bet.

I don't think that is the case as I replaced the main battery in June 22 and the car has only done just over 5,000 miles since then, also the stop/start works fine.

 

[Tony7Bear]

Do you have large feet? It might just be that as you stab at the brake pedal, you're getting a very slight touch on the throttle pedal, which will stop the hold engaging. Don't ask how I know...

I do have quite big feet however it is definitely not that as this would be happening at places other than that particular spot.