Last couple of trucks I had have had engine turn to yellow. I stop immediately bring my blowtorch out to repair it - it does full cycle but does not make the yellow engine go away - This is now two trucks in the past week unable to repair no matter how many times I click repair and run the repair cycle it will not change from yellow. I'm not sure and don't want to find out by being stranded if this is just a visual bug and the engine is not really yellow but it's taking me a lot of time to have to keep switching out for a new truck. Anyone else have trouble repairing engine with blowtorch?