ROD 1327710 - Caterpillar

PID 00128 FMI 04Conditions Which Generate This Code:This diagnostic code is used only by GMT-560 applications.The ECM detects the following:
The Secondary Fuel Level signal voltage is below the acceptable range for more than 10 seconds.System Response:If the parameter "Primary Fuel Tank Size" is programmed and a diagnostic code for the primary fuel level sensor is not active, the ECM will use the primary fuel level sensor to determine the fuel level. If the parameter "Primary Fuel Tank Size" is not programmed and a diagnostic code is active for the primary fuel level sensor, the ECM will broadcast an error code over the J1939 data link. The ECM will also broadcast the fuel level as 0 over the ATA data link.The electronic service tool will display "DIAG" next to "Secondary Fuel Level"on the status screen while the diagnostic code is active.Test Step 1. Perform the following diagnostic procedure: "Fuel Level Sensor Circuit - Test"Results:
OK - STOP