CAT 3406E (Prefix 1MM or 2WS) Fault Code: 21 PID: SPN: 41 FMI: 4 8 Volt Supply voltage low

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

The 8 volt supply is less than 7.5 VDC for more than one second.
The ECM has been powered for more than three seconds.

Probable Causes:

1) ECM Connection/Harness
2) Accelerator Position Sensor
3) Accelerator Position Sensor Harness
4) ECM Failure

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 21 PID: SPN: 41 FMI: 3 8 Volt Supply voltage high

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 16 PID: SPN: 173 FMI: 11 Very High Exhaust Gas Temperature Derate

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 16 PID: SPN: 173 FMI: 0 High Exhaust Gas Temperature Derate

CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 122 FMI: 6 Med/High Retarder current high

If you want to know other articles similar to CAT 3406E (Prefix 1MM or 2WS) Fault Code: 21 PID: SPN: 41 FMI: 4 8 Volt Supply voltage low you can visit the category 3406E (Prefix 1MM or 2WS).

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