IMPELLER 2128183 - Caterpillar

Conditions Which Generate This Code:The supply voltage from the master Electronic Control Module (ECM) to the sensors for the following parameters is exceeding the normal level:
Inlet air temperature
Engine oil temperature
Unfiltered engine oil pressure
Filtered engine oil pressure
HumiditySystem Response:All of the inputs to the master ECM for the 5 volt sensors assume default values. All other diagnostic codes for the 5 volt sensors are disabled while this diagnostic code is active. The "Status" screen of Caterpillar Electronic Technician (ET) indicates a "Sensor Supply Fault" for each sensor. This indicates that the sensors are not operating due to an active diagnostic code.The shutdown indicator is activated. The code is logged.Since engine protection is disabled, the engine is shut down.Test Step 1. Perform the following diagnostic procedure: +5V Sensor Voltage SupplyResults:
OK - STOP