CAT 3406E (Prefix 1MM or 2WS) Fault Code: 62 PID: SPN: 111 FMI: 11 Very Low Coolant Level

Posted by PerDiezel Solutions on January 13, 2026

The Engine Control Module (ECM) detects the following conditions:

•The coolant level is very low for more than 30 seconds.
•The “Coolant Level Sensor” parameter is programmed to “Yes”.

Probable Causes:

1) Coolant level
2) Coolant level sensor/harness

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 62 PID: SPN: 111 FMI: 1 Low Coolant Level Warning

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 61 PID: SPN: 110 FMI: 11 Very High Coolant Temperature

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 61 PID: SPN: 110 FMI: 0 High Coolant Temperature Warning

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 59 PID: SPN: 252 FMI: 11 Engine Software Incorrect

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 58 PID: SPN: 249 FMI: 11 J1922 Data Link Fault

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 58 PID: SPN: 231 FMI: 12 J1939 Device Not Responding

WARNING!