Error code

OBD2 P2003

OBD2P2003
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Particulate Trap Efficiency Below Threshold.

Severity

moderateCan drive, but performance may be affected and the issue should be addressed.

Summary

P2003 indicates that the particulate trap efficiency is below threshold on bank 2 of the diesel engine.

Symptoms

  • Malfunction indicator light (MIL) illuminated
  • Poor fuel economy
  • Hard starting

Common Causes

  • Driver habit leading to insufficient DPF regeneration
  • Overcharged DPF due to poor engine maintenance or high sulfur content fuels
  • Defective differential pressure sensor (DPS)
  • Outdated vehicle software

Diagnosis

  1. Clear DTC and check if it returns after driving at highway speeds for about thirty minutes.
  2. Inspect exhaust system for leaks before the DPF.
  3. Check DPS connector and harness for damage or corrosion.

Fixes

  • Perform a manual DPF regeneration cycle using a scan tool.
  • Replace defective differential pressure sensor (DPS).

FAQ

What is the best way to prevent P2003 from occurring?

Maintain regular driving habits that include highway speeds and ensure proper maintenance of the engine.

Can I drive with this code active?

Yes, but performance may be affected. It's recommended to address the issue promptly.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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