05 April, 2025CAT 3406E (Prefix 1MM or 2WS) Fault Code: 62 PID: SPN: 111 FMI: 1 Low Coolant Level Warning The ECM detects the following conditions: •The coolant level is low for more than ten seconds. Probable Causes: 1) Coolant level2) Coolant level sensor/harness Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Back to blog Leave a comment Name * Email * Comment * Please note, comments need to be approved before they are published.