P3890moderate severityPowertrain
Exhaust Pressure Control Valve Malfunction
on 2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD
What this code means
The exhaust pressure control valve (exhaust brake or back-pressure valve) has a malfunction. This valve can be used for exhaust braking and to raise exhaust temperature.
Symptoms
- Check Engine Light
- No exhaust braking function
- Reduced DPF regen capability
- Engine braking feel reduced
- Exhaust temperature management affected
Common causes
- Valve actuator failure
- Carbon buildup on valve
- Vacuum/pressure line disconnected
- Valve position sensor fault
- Wiring harness damage
Diagnostic steps
- Command exhaust brake on/off with scan tool
- Monitor valve position vs commanded
- Check actuator vacuum/pressure supply
- Test valve position sensor
- Inspect valve for carbon deposits
Repair notes
Replace exhaust pressure control valve or actuator. Clean carbon deposits from valve and housing.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1