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