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PACCAR MX (2004 Emissions) Fault Code: U1858 A Fault Exists With the DECECU 11 CVN Calculation

PACCAR MX (2004 Emissions) Fault Code: U1858 A Fault Exists With the DECECU 11 CVN Calculation

SET CONDITIONS:
This DTC is set when a CAN message is received correctly, but the content (signal value or status) is not available.

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:
A malfunction in the system from which the message originates.