E272 Inlet Air Restriction Warning
Conditions Which Generate This Code:
The ECM detects the following condition:
- The inlet air restriction reaches 8 kPa (1.2 psi).
System Response:
The ECM will log the event. The ECM will transmit a warning to the display in the cab. If the restriction increases, the ECM will derate the engine. Fuel is decreased by two percent for each 1 kPa (0.15 psi) of restriction above 8 kPa (1.2 psi). At the maximum derate, the ECM will reduce the fuel by 10 percent. The ECM will illuminate the air filter restriction lamp when the derate is active. The highest percentage of derate is latched until the ECM is powered down.
- Low Power
- The air filters may be plugged.
Test Step 1. Check the Air Filters
Clean plugged air filters or replace plugged air filters. Refer to Operation and Maintenance Manual. Ensure that the repair eliminates the problem.
Results:
- OK - Stop.
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