Just change the temp sensor not a fortune and easy enough to do. Reading the posts bring Mountain and Molehill to mind. I would try the sensor first. so I’ve unplugged the temp sensor and it still comes up with the same issue mate. What leads you to believe it is an ECU fault just because you cant ...

Warning light in general doesn’t appear like even when ignition on, I’m able to communicate with the ecu when the car works and everything reads fine and also able to connect with every single module, even when it has the issue I can still read all modules bar ecu. I’m gonna check the grounds etc. H...

Thanks for replying. I can’t communicate with the ecu once the fault happens. When I do a scan of any other module it doesn’t bring up any faults for it. Also the eml/dde light has never once lit up on the dashboard. I took the car to get the ecu reprogrammed and the guy couldn’t even reprogram it a...

I’ve also tried to see what happens when the ecu is completely unplugged and the temp still shoots to the top, hopefully this extra info helps

So I’m having an issue with my e53 3.0d on a 2006. So this issue is my temp gauge shoots straight up to the red and the fuel inject. System comes up, it doesn’t do it all the time and I can eventually get the car started but other times I can take hours to get it started. I’ve had the ecu out and re...