P3893high severityPowertrain
Diesel Particulate Filter Ash Loading High
on 2010 Audi A3 2.0L TDI I4 · FWD
What this code means
The DPF ash accumulation (non-combustible residue from oil) has reached a level requiring cleaning or replacement. Ash cannot be removed by regeneration.
Symptoms
- DPF warning light
- Reduced engine performance
- Increased exhaust backpressure
- Regeneration less effective
- Fuel economy declining
- DPF replacement or cleaning message
Common causes
- Normal ash accumulation over mileage
- Excessive oil consumption increasing ash
- Wrong oil specification (high ash)
- Extended DPF service interval
- Frequent regeneration depositing more ash
Diagnostic steps
- Measure DPF differential pressure at idle
- Compare to ash loading model in ECM
- Check engine oil consumption rate
- Verify oil specification (low SAPS)
- Review DPF mileage and service history
Repair notes
DPF professional cleaning (baking/pneumatic) or replacement. Use low-SAPS oil per manufacturer specification to minimize future ash buildup. Address any oil consumption issues.
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