Peterbilt 220, Operator'S Manual

Page: 63 / 136

Warning Indicator Description
Emission failure
Engine power is derated. A derate is activated or deactivated
based on the severity of the derate condition and can result in the
truck stopping. The engine is derated under the following
conditions:
• Emission level is above the legal limits.
• Malfunction of the EAS system.
DEF warning
This warning symbol can give the following text descriptions:
• DEF level low or DEF tank empty: Fill up the DEF tank.
• Incorrect DEF: Replace the incorrect DEF.
• DEF dosing malfunction.
NOTE
When this warning is active, the MIL appears, the engine
power is derated and eventually the vehicle speed is limited.
After refilling the DEF tank, this warning, the MIL, engine de-
rate, and speed limit are switched off. A small quantity of DEF
remains in the DEF tank even if the DEF tank empty warning
is active.
CONTROLS - Master Display
Y53-6078-1B1 (12/18/18) 61
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