BASE AS 1291142 - Caterpillar

Use this procedure to troubleshoot a problem with a sensor. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
Table 1
J1939 Code and Description CDL Code and Description Comments
95-2
Engine Fuel Filter Differential Pressure : Erratic, Intermittent, or Incorrect 95-2
Fuel Filter Differential Pressure Sensor : Erratic, Intermittent, or Incorrect This code indicates that the fuel pressure sensor connections are swapped.
Swap the connectors for the unfiltered and filtered fuel pressure sensors.
99-2
Engine Oil Filter Differential Pressure : Erratic, Intermittent, or Incorrect 99-2
Engine Oil Filter Differential Pressure Sensor : Erratic, Intermittent, or Incorrect This code indicates that the oil pressure sensor connections are swapped.
Swap the connectors for the oil pressure sensor before the secondary filter and the oil pressure sensor after the secondary filter.
100-3
Engine Oil Pressure : Voltage Above Normal 100-3
Engine Oil Pressure Sensor : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is not in the acceptable range.
The code is logged.
100-4
Engine Oil Pressure : Voltage Below Normal 100-4
Engine Oil Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
101-3
Engine Crankcase Pressure : Voltage Above Normal 101-3
Crankcase Air Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
101-4
Engine Crankcase Pressure : Voltage Below Normal 101-4
Crankcase Air Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
108-3
Barometric Pressure : Voltage Above Normal 3528-3
Barometric Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
108-4
Barometric Pressure : Voltage Below Normal 3528-4
Barometric Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
109-3
Engine Coolant Pressure : Voltage Above Normal 2302-3
Engine Coolant Pump Outlet Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
109-4
Engine Coolant Pressure : Voltage Below Normal 2302-4
Engine Coolant Pump Outlet Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
127-3
Transmission Oil Pressure : Voltage Above Normal 127-3
Transmission Oil Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
127-4
Transmission Oil Pressure : Voltage Below Normal 127-4
Transmission Oil Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
1176-3
Engine Turbocharger 1