Thursday, February 14, 2019 - 09:31 am, by: Mike Beck(Gold_40gt)
I'd imagine there would be leakage in and around HC345 as well which can open up a real can of worms, fairly rare just to have C507 leaking.
From my ECU repair experience, HC345 faults related to idle problems, and directly trigger digital dash electrical error messages, often not relating to specific codes as it's an internal ECU fault.
