PACCAR MX (2004 Emissions) Fault Code: P151E Aftertreatment System – DEF Tank Empty

SET CONDITIONS:
The DEF level is less than 11% of the DEF tank volume.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the ignition is on.

RESET CONDITION:
This DTC becomes inactive after the ignition is keyed on and the volume in the DEF tank is above the set condition value.

POSSIBLE CAUSES:
Empty DEF tank

ADDITIONAL INFORMATION:
1. This DTC activates an engine torque derate of 40% and P151B becomes active.

2. This DTC activates a 5 MPH vehicle speed limit and P151A becomes active, after:
– A key cycle or
– Vehicle refuel (fuel tank volume increase > 16%) or
– Vehicle has been stationary for 1 hour