Coleman HS400UTV-2 Owner's Manual page 112

8-8 Periodic Maintenance and Adjustment
EFI system
EFI engine was completely different from the
engine which uses carburetor, it consist of
ECU, EFI-cables, sensors, actuators and
other advanced components.
As the following pictures:
1. ECU
1. Oxygen sensor
2. Oxygen sensor threaded sleeve
3. Exhaust Pipe