HOSE AS 3621752 - Caterpillar

The engine has been running for at least 3 minutes.
The inlet manifold air temperature has exceeded the trip point for the application and the delay time of 4 seconds has expired.
No other codes for the intake manifold air temperature are active.The ECM detects the following conditions:
The inlet manifold air temperature is greater than 76 °C (168 °F) for the 3056E engine.
The inlet manifold air temperature is greater than 135 °C (275 °F) for the 3054E turbocharged engine.
The inlet manifold air temperature is greater than 82 °C (179 °F) for the aftercooled 3054E turbocharged engine.
The inlet manifold air temperature is greater than 112 °C (233 °F) for the 3054E naturally aspirated engine.The ECM will reset when the following conditions are met:
The inlet manifold air temperature is less than 74 °C (165 °F) for the 3056E engine.
The inlet manifold air temperature is less than 133 °C (271 °F) for the 3054E turbocharged engine.
The inlet manifold air temperature is less than 80 °C (176 °F) for the aftercooled 3054E turbocharged engine.
The inlet manifold air temperature is less than 110 °C (230 °F) for the 3054E naturally aspirated engine.System Response:The alarm output is activated. The code is logged.Possible Performance Effect:The ECM will derate the engine. The ECM will continue to derate the engine at a higher rate as the inlet manifold air temperature rises.Troubleshooting:Test Step 1. Refer to Troubleshooting, "Intake Air Temperature Is Too High".Results:
OK - STOP