Reductant pump motor speed differs too much from demanded speed.
1. Use the diagnostic tool to run the reductant circuit test. 2. If the pump motor speed feedback differs too much from the demanded pump speed, the test will fail. 3. If the test fails, replace filters 4. if that does not solve the prblem check the harness and connectors between the EEC control unit (E67) and the reductant pump (V183) for electrical failure. 4. If no electrical failure in the harness or connectors are found, change the pump. If a failure has been found and corrected, use the reductant circuit test to check that the system is working and to inactivate the fault code.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Reductant pump motor speed sensor gives a value that differs more than the max allowed speed difference in relation to the demanded speed.
1. The reductant pump (V183) motor speed sensor has an electrical failure. 2. The reductant (V183) pump motor has an electrical failure. 3. There is a fault in the control signal from the EEC control unit (E67) to the reductant pump (V183) 4. There is a blockage in the system and the pump is limiting its speed to prevent too high pressures