CAT 3406E (Prefix 1MM or 2WS) Fault Code: 00 PID: SPN: 52 FMI: 11 Air Inlet Shutoff Shutdown

This code indicates that the engine was shutdown due to an engine overspeed condition.

Probable Failures:

1) Talk to the driver.
2) If no driver error, issue may be in the Air Inlet Shutoff Circuit
3) Test air inlet shutoff switch & wiring
4) Transmission nuetral switch/wiring
5) Air shut off valve solenoid
6) Air inlet shutoff relay
7) ECM Failure

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