Definitely leave the car running for a good while after having the capacitor changed to charge it up.Hi, just had my aux battery (voltage regulator) as the dealership call it changed under extended warranty, problem is the dealership informed me it has not cleared the message fault, and if I want them to see what’s causing the issue they want £160 an hour to fault find, just wondering if it’s a good drive could cure the issue, anyone else had this sort of experience after changing the regulator.
Give it a good drive of an hour or so after letting the car idle for at least 30 minutes, the error should clear itself, if it doesn't then either the capacitor itself is still faulty or you might need to get the error reset but it's usually not a stored error but a live one iirc.