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P3880

Diesel Oxidation Catalyst (DOC) Efficiency Below Threshold

2009-2013 Audi A3 2.0L TDI

High SeverityPowertrainGeneric (SAE)

Description

The diesel oxidation catalyst efficiency has dropped below the acceptable level. The DOC oxidizes CO and HC and raises exhaust temperature for DPF regeneration.

Symptoms

  • Check Engine Light
  • DPF regeneration may be affected
  • Higher CO and HC emissions
  • Failed emissions test
  • Exhaust smell
  • DPF soot loading increasing

Common Causes

  • DOC catalyst degradation
  • Fuel sulfur contamination
  • Oil consumption contaminating DOC
  • Exhaust leak before DOC
  • DOC temperature sensor error

Diagnostic Steps

  1. Compare DOC inlet and outlet temperatures during warm-up
  2. Check hydrocarbon conversion efficiency
  3. Inspect DOC for physical damage
  4. Test exhaust temperature sensors
  5. Check for exhaust leaks before DOC

Repair Notes

Replace diesel oxidation catalyst. Address root cause of contamination (oil consumption, fuel quality). Check DPF system operation after DOC replacement.

Related Codes

P0420Catalyst System Efficiency Below Threshold Bank 1P3830SCR System Efficiency Below ThresholdP3851DPF Regeneration Incomplete - Multiple Attempts

Other Powertrain Codes

P3880 on Other Vehicles

Common Questions

What does code P3880 mean on a 2009-2013 Audi A3?

P3880 stands for "Diesel Oxidation Catalyst (DOC) Efficiency Below Threshold". The diesel oxidation catalyst efficiency has dropped below the acceptable level. The DOC oxidizes CO and HC and raises exhaust temperature for DPF regeneration.

What are the symptoms of P3880 on a Audi A3?

Common symptoms of P3880 include: Check Engine Light, DPF regeneration may be affected, Higher CO and HC emissions, Failed emissions test, Exhaust smell, DPF soot loading increasing.

What causes P3880 on a 2009-2013 Audi A3?

Common causes of P3880 include: DOC catalyst degradation, Fuel sulfur contamination, Oil consumption contaminating DOC, Exhaust leak before DOC, DOC temperature sensor error.

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