C15 and C18 Industrial Engines Caterpillar

Use this procedure if the following event code is active. Refer to Troubleshooting, "Event Code List" for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.

Table 1

Event Code
Code and Description	Conditions which Generate this Code	System Response
E272(1) Inlet Air Restriction Warning	The inlet air restriction is above the trip point pressure for the delay time.	The code is logged.
E031(2) Air Filter Restriction Derate		The engine is derated. The code is logged.

Probable Causes

• Air filter element

Recommended Actions

Air Filter Element

Check the air intake system for plugged air filters or for damaged air filters. If the engine is equipped with an air intake precleaner, verify the proper operation of the air intake precleaner.