FILTER ELEMENT AS-AIR 1467472 - Caterpillar

"Diagnostic" Lamp
Use the "DIAGNOSTIC" Lamp or a Caterpillar electronic service tool to determine the diagnostic flash code.Use the following procedure to retrieve the flash codes if the engine is equipped with a "DIAGNOSTIC" lamp:
Turn the cruise control ON/OFF switch to the OFF position.
Move the SET/RESUME switch to either position. Hold that position until the "YELLOW" lamp begins to flash.The "YELLOW" lamp will flash in order to indicate a two digit flash code and the SET/RESUME switch may be released. The sequence of flashes represents the system diagnostic message. Count the first sequence of flashes in order to determine the first digit of the flash code. After a two second pause, the second sequence of flashes will identify the second digit of the flash code.Any additional flash codes will follow after a pause. These codes will be displayed in the same manner. Flash Code 55 indicates that No Detected Faults have occurred since the ignition key switch has been turned to the ON position.For further information, assistance for repairs, or troubleshooting, refer to the Service Manual or consult an authorized Caterpillar dealer.Table 1 lists the flash codes and the table also gives a brief description of the flash codes.Note: Table 1indicates the potential effect on engine performance with "ACTIVE" flash codes.Some codes record events. Also, some codes may also indicate that a mechanical system needs attention. Troubleshooting is not required for codes "35", "41", "47" and "55". Code 01 will not display a flash code. Some codes will limit the operation or the performance of the engine.Table 1 indicates the potential effect on the engine performance with active flash codes. Table 1 also forms a list of Electronic diagnostic codes and descriptions.
Table 1
   Flash Codes for 3126E Truck Engines    
Diagnostic Flash Code    Effect On Engine Performance (1)    Suggested Operator Action    
Engine Misfire Low Power    Reduced Engine Speed    Engine Shutdown    Shut Down the Engine (2)    Service (3)    Schedule Service. (4)    
12     Coolant Level Sensor Circuit Fault (5) (6)                             X    
15     An Injection Actuation Pressure Sensor Circuit Fault         X     X             X        
17     Injection Actuation Pressure Sensor Out of Range     X     X         X         X        
18     Driver Fault for the Injection Actuation Pressure Control Valve     X             X         X        
21     Sensor Supply Voltage Fault (7)         X                     X    
24     Oil Pressure Sensor fault (6)         X                 X        
25     An Inlet Air Pressure Sensor Circuit Fault         X                     X    
26     Atmospheric Pressure