•
The MIL lamp illuminates
Pre-2013 Detroit engines: Power is limited, with a 55
mph (90 km/h) speed limit.
Cummins and 2013 Detroit engines: Power is limited
with progressively harsher engine power limits
applied.
DEF Tank Empty and Ignored
If the empty warning is ignored and the DEF tank is
not refilled, the red STOP engine lamp illuminates in
addition to the MIL lamp and CHECK engine lamp
(on vehicles with a Cummins ISB or ISC/L engine).
See
Fig. 11.13.
If the DEF is not refilled, a 5 mph (8 km/h) speed
limit is applied after the next engine shutdown or if a
fuel refill is detected.
DEF Contamination or SCR Tampering
NOTICE
Once contaminated DEF or tampering has been
detected, the vehicle must be taken to an autho-
rized service facility to check the SCR system for
damage and to deactivate the warning lights and
engine limits.
If contaminated DEF or tampering with the ATS is
detected, the DEF warning light flashes and the MIL
lamp illuminates to warn the driver. The CHECK en-
gine lamp also illuminates on vehicles with a Cum-
mins ISB or ISC/L engine. See
Fig. 11.13.
•
Detroit engines: Engine power is limited with
progressively harsher limits applied. If the fault
is not corrected, the STOP engine light illumi-
nates and a 5 mph (8 km/h) speed limit is ap-
plied after the next engine shutdown, while
parked and idling, or if a fuel refill is detected.
•
Cummins engines: Engine power is limited with
progressively harsher limits applied. If the fault
is not corrected, the STOP engine light illumi-
nates and a 5 mph (8 km/h) speed limit is ap-
plied after the next engine shutdown, or while
parked and idling.
09/25/2006 f610816a
Fig. 11.7, HEST Lamp
07/24/2009
f470542
1
2
1. Batteries 2. DEF Tank
Fig. 11.8, DEF Tank Located Behind the Battery Box
07/24/2009
f470541
1
2
1. DEF Tank 2. Fuel Tank
Fig. 11.9, DEF Tank Located Forward of the Fuel Tank
Emissions and Fuel Efficiency
11.6
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