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P2003ModerateEmissions

P2003: Diesel Particulate Filter Efficiency Below Threshold (Bank 2)

Found on 1 vehicle models across 1 makes

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P2003 is an OBD-II diagnostic trouble code meaning “Diesel Particulate Filter Efficiency Below Threshold (Bank 2).” The DPF on Bank 2 is not filtering effectively. According to Au7o's database, this code appears across 1 vehicle models from 1 manufacturers. Full vehicle-specific causes and solutions at au7o.io.

1
Vehicles Affected
1
Makes
2
Related Issues

Common Causes

1DPF degradation
2Incomplete regeneration
3Excessive soot
4Pressure sensor fault
5Oil contamination

Diagnostic Tools

To diagnose P2003, you'll need an OBD-II scanner. Here are our recommendations at every price point.

Budget Pick$10–$20

ANCEL AD310 Classic OBD-II Scanner

by ANCEL

A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).

  • Read & clear engine codes
  • View freeze frame data
  • I/M readiness status
  • No batteries or app needed
Check Price on Amazon
Best Value$90–$120

BlueDriver Pro Bluetooth Scanner

by BlueDriver

Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.

  • Enhanced diagnostics (ABS, SRS, transmission)
  • Repair Reports with verified fixes
  • Smog check readiness
  • Free app (iOS & Android)
Check Price on Amazon
Advanced$180–$230

LAUNCH CRP123X OBD-II Scanner

by LAUNCH

A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.

  • Engine, transmission, ABS, SRS diagnostics
  • Live data stream & graphing
  • AutoVIN for vehicle identification
  • Free lifetime updates via Wi-Fi
Check Price on Amazon
Professional$350–$450

Autel MaxiCOM MK808S Diagnostic Tool

by Autel

Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.

  • All-system diagnostics (25+ modules)
  • Bi-directional control & active tests
  • Oil reset, EPB, BMS, TPMS, injector coding
  • 7-inch touchscreen with Android OS
Check Price on Amazon

As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.

Vehicles Affected by P2003

Click any vehicle to see the full issue details, symptoms, and repair guide.

Related Codes

P2002Diesel Particulate Filter Efficiency Below Threshold (Bank 1)P2004Intake Manifold Runner Control Stuck Open (Bank 1)P2006Intake Manifold Runner Control Stuck Closed (Bank 1)01447EVAP System (VAG)P0401Exhaust Gas Recirculation Flow InsufficientP0402Exhaust Gas Recirculation Flow ExcessiveP0403Exhaust Gas Recirculation Circuit MalfunctionP0404Exhaust Gas Recirculation Circuit Range/Performance

Frequently Asked Questions

What does P2003 mean?

P2003 stands for "Diesel Particulate Filter Efficiency Below Threshold (Bank 2)." The DPF on Bank 2 is not filtering effectively.

What are the most common causes of P2003?

The most common causes of P2003 are: DPF degradation, Incomplete regeneration, Excessive soot, Pressure sensor fault, Oil contamination. The specific cause varies by vehicle — Au7o documents vehicle-specific causes for 1 models.

How much does it cost to fix P2003?

Repair costs vary widely depending on the root cause and vehicle. Check the vehicle-specific issues below for estimated costs.

Which vehicles are affected by P2003?

Au7o has documented P2003 across 1 vehicle models from 1 manufacturers: Audi. See the full list below for vehicle-specific causes and repair costs.

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