New Holland WorkMaster 50 Service Manual page 959

DTC 4E3-04-Level 2 Monitoring : Diagnosis fault check to report the
error to demand for an ICO due to an error in the PoI2 shut-off
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 performs a diagnostic fault check for post injection 2. If the ECU A-9000
determines that the post injection 2 quantity has exceeded the expected value, this fault will occur.
Solution:
1. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
Electrical systems - FAULT CODES
47866583_ 02/12/2015
55.12 [55.DTC] / 238