PACCAR MX (2004 Emissions) Fault Code: U1901 CAN – Message (DPFC2) Rate Too High from Aftertreatment System
PACCAR MX (2004 Emissions) Fault Code: U1901 CAN – Message (DPFC2) Rate Too High from Aftertreatment System
SET CONDITIONS:
This DTC is set when the repetition rate of the received CAN message is higher than expected.
DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on.
RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.
POSSIBLE CAUSES:
1. ECU software mismatch
2. Defective components
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