DEF Dosing Valve Stuck Closed
2009-2013 Audi A3 2.0L TDI
Description
The DEF injection valve (dosing valve) that sprays DEF into the exhaust is stuck in the closed position. No DEF is being injected.
Symptoms
- DEF not being consumed (level not dropping)
- NOx emissions elevated
- SCR efficiency code may follow
- Derate warning countdown
- Check Engine Light
- Potential speed limitation
Common Causes
- DEF crystallization blocking valve
- Dosing valve solenoid failure
- DEF frozen in valve (cold weather)
- Contaminated DEF clogging valve
- Valve mechanical failure
Diagnostic Steps
- Monitor DEF dosing command vs actual injection
- Inspect dosing valve for crystallization
- Test valve solenoid electrically
- Check DEF line heating system
- Attempt to command valve open with scan tool
Repair Notes
Replace DEF dosing valve. Clean DEF supply line. Check DEF line heater operation for cold weather crystallization prevention.
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
P3832 on Other Vehicles
Common Questions
What does code P3832 mean on a 2009-2013 Audi A3?
P3832 stands for "DEF Dosing Valve Stuck Closed". The DEF injection valve (dosing valve) that sprays DEF into the exhaust is stuck in the closed position. No DEF is being injected.
What are the symptoms of P3832 on a Audi A3?
Common symptoms of P3832 include: DEF not being consumed (level not dropping), NOx emissions elevated, SCR efficiency code may follow, Derate warning countdown, Check Engine Light, Potential speed limitation.
What causes P3832 on a 2009-2013 Audi A3?
Common causes of P3832 include: DEF crystallization blocking valve, Dosing valve solenoid failure, DEF frozen in valve (cold weather), Contaminated DEF clogging valve, Valve mechanical failure.