CAT 3406E (Prefix 1MM or 2WS) Fault Code: 64 PID: SPN: 105 FMI: 0 High Intake Manifold Air Temperature Warning

The ECM detects the following conditions:

•The intake manifold air temperature is greater than 90 °C (194.0 °F) for more than four seconds.
•The engine has been running for at least 30 seconds.
•The engine coolant temperature is above 99 °C (210.0 °F).

Probable Causes

1) Coolant level low
2) Debris/low air flow through charge air cooler
3) Heavy load on engine + high ambient air temperature

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