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Home / DTC TRUCKS / CAT / 3406E (Prefix 1MM or 2WS) / CAT 3406E (Prefix 1MM or 2WS) Fault Code: 12 PID: SPN: 111 FMI: 3 Coolant Level voltage high

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 12 PID: SPN: 111 FMI: 3 Coolant Level voltage high

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

•The signal voltage from the coolant level sensor is greater than 4.5 VDC for more than ten seconds.
•The “Coolant Level Sensor” parameter is programmed to “2-wire Float Sensor”.
•The ECM has been powered for at least two seconds.

Probable Causes:

1) Coolant Level Sensor
2) Coolant Level sensor wiring
3) ECM failure

Categories 3406E (Prefix 1MM or 2WS), CAT, DTC TRUCKS Tags 111, 12, 1MM, 2WS, 3, 3406E, CAT, Code, Coolant, Fault, FMI, High, Level, or, PID, Prefix, SPN, Voltage

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