Okay, so I'm getting a message on the display saying my start/stop in no longer working.
Now, I never use it, but I don't like stuff that should work, not working!
Any idea what it could be? I have been told most likely a faulty battery?
It's a 2013 R56 JCW.
many things will effect it.
1, any fault codes stored on ecu,(some codes dont show a eml light deep scan needed autocom/snooper software will do it,
2 if only using car for short trips and parked up for long times as battery will not get to max storage and system will prevent start stop form working until this is met.
3 battery getting worn out 5 years seems to be a common point on those batteries for start stop.
might be electrical fault somewhere but number 1 will cover that, most seem to be number 2 and 3 and the age of car would point me off in that area,, would check voltage when car running after a 2 hour drive in day light hours,, it should be 14.2v to 14.9volts car running, if switch car off and disconnect battery then read the battery standing voltage after a hour of rest, 12.6v to 12.8 volts is good battery anything less battery is getting ill. after thos a drop test is needed ie heavy load on battery with a spiked battery tester for 60 seconds the battery should recover after to 12.6-12.8volts
the charging system is ecu controlled once again diagnostics worth using, also common thing with alternator is free wheel pulley fails,, can tell engine idling look at belt if it seems to jump fast and slow then pulley is ill . £40 on ebay for new one