What to do if HIHI T-Exhaust Mean error appears on MTU 20V 4000 L62 Engine?
- LLogan ClarkeAug 18, 2025
If the average exhaust temperature of all cylinders is too high on your MTU Engine, you should first check the emission values. Then, check the ignition timing and the valve drive to ensure the exhaust valves are closing properly. The cause of this issue is that the average value of all individual cylinder exhaust temperatures is too high.