Stop Start cutting back in
If your stop start system cuts in as normal, ie. the engine turns off, but then restarts automatically almost immediately or within say 5-10 seconds, and you know that you have just been on a long run,and battery should be well charged etc. well I had a similar 'problem'.
The cause was traced to a faulty sensor integral to the brake booster servo unit. This links with the energy regeneration charging switch etc
This fault should show up on the dealers diagnostic.
The brake booster unit was replaced, problem solved.
Don't listen to the usual std. service reception staff guff about cold engines,external temp <6.5c deg, air con, fan on,driving lights, radio on,de da de da
As a general technical point on the battery charge level, the system will not work when the current drain drops the voltage to < 13.78v
Last edited by Seamus Not Faster; Dec 7th, 2011 at 08:51 PM.