This code indicates that the engine has been derated in order to prevent excessive exhaust temperatures. The engine will only be derated to a level that will allow the exhaust temperature to be lowered to an acceptable level. This code will be logged once the engine has been derated by more than 4%. This is not a code, but an event being logged . Talk to the driver to see if the engine was running under heavy loads or climbing steep hills.
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 122 FMI: 6 Med/High Retarder current high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 122 FMI: 5 Med/High Retarder current low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 121 FMI: 6 Low/High Retarder current high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 121 FMI: 5 Low/High Retarder current low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 13 PID: SPN: 174 FMI: 4 Fuel Temperature voltage low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 13 PID: SPN: 174 FMI: 3 Fuel Temperature voltage high
