Hi all I have a b8 sline with idle problems have changed common rail sensors either end, Mass Flow sensor also checked if there is a air leak still no joy sometimes idling issues can go away for a week then come back 😭 there was two codes at the start P010400 and P106500 but once I changed all the sensors I cleared them no lights on display any ideas please help thanks again 

Could it be injector issue or injector seal issue? Or a lambda sensor issue. 

Thanks Steve have now done a injector leak test found out one is filling quickly have a injector ordered if not with try a lambda sensor thank you for your response 👍

2 hours ago, Murphe said:

Thanks Steve have now done a injector leak test found out one is filling quickly have a injector ordered if not with try a lambda sensor thank you for your response 👍

You're welcome, please keep us posted on how you get on ☺️