Exhaust Pressure Control Valve Malfunction
2009-2013 Audi A3 2.0L TDI
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3890 on Other Vehicles
Common Questions
What does code P3890 mean on a 2009-2013 Audi A3?
P3890 stands for "Exhaust Pressure Control Valve Malfunction". 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.
What are the symptoms of P3890 on a Audi A3?
Common symptoms of P3890 include: Check Engine Light, No exhaust braking function, Reduced DPF regen capability, Engine braking feel reduced, Exhaust temperature management affected.
What causes P3890 on a 2009-2013 Audi A3?
Common causes of P3890 include: Valve actuator failure, Carbon buildup on valve, Vacuum/pressure line disconnected, Valve position sensor fault, Wiring harness damage.