MUFFLER A 6C2104 - Caterpillar

Table 1
Event Code
Code and Description Conditions which Generate this Code System Response
E289(3) Low System Air Pressure The engine's Electronic Control Module (ECM) loses ground potential on the input for the brake pressure. The code is logged. The engine's ECM activates the "brake air pressure lamp" on the control panel. Probable Causes
Low Air Pressure
Air leak
Air compressor
Air pressure switch(s)Recommended Actions
Air Leak
Inspect the system for air pressure in order to determine if any leaks are present.Air Compressor
Verify that the air compressor is operating correctly.Air Pressure Switch(s)
If the air pressure is OK and the air compressor is operating correctly, there may be a problem with the circuit for the air pressure switch(s). If a problem is suspected in the circuit for the air pressure switch(s), refer to Troubleshooting, "Brake Air Pressure - Test".