This Ferrellgas truck came in for a pre smog check. We found that the engine was overheating and computer had multiple codes. The truck would not have passed smog in that condition. The repairs included: injector connector, injector connector wiring for the misfire, radiator was plugged which caused cool spots which didn’t allow the fan drive to operate properly, and the radiator was replaced. With the engine running at normal operating temperature, the engine codes were taken care of aswell.