Engine management light came on last weekend but went off the next day. Did a scan yesterday and found some new codes. I've removed the standard codes of fault handles, buttons and footwell heaters. Its on a 06 A8. This keeps coming back instantly. I've used tow bar and electrics with no issues. It all worked fine. I checked the wiring and it looked fine. Glow plug is an old one and before the weather turns and I can't get out there, I think its time to get it fixed. Is it normally new glow plug? I think the intake manifold runner control is was cause my engine managment light to come on. I've not seen it before. Anyone got any ideas? Its not come back since. This is a new one and I hate it when it says mechanical failure. I got no idea what it is talking about. I'm going to rebuild the pump this weekend with bagpippingandy kit. Hopefully that will stop the two fault codes. I assume they came on cause of the piston ring aging? Not seen this before. Battery has been fine. No issues.