P2003Emissions / Exhaust

Diesel Particulate Filter Efficiency Below Threshold Bank 2

P2003 is the Bank 2 version of the DPF efficiency fault. The diesel particulate filter on Bank 2 is not filtering soot efficiently or is not regenerating correctly. Causes include a clogged DPF, failed regeneration, or a sensor fault.

🚗 Yes, but a clogged DPF can cause limp mode; service it soon.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Clogged or ash-loaded DPF$300-$3000

40%

Soot or ash blocks the Bank 2 filter.

#2Failed or incomplete regeneration$100-$800

30%

The filter cannot burn off stored soot.

#3Faulty DPF pressure or temperature sensor$100-$400

20%

Bad sensor data creates a false efficiency reading.

#4Exhaust leak affecting pressure readings$100-$500

10%

Leaks skew the pressure measurement.

🩺 Common Symptoms

Check engine light on
Reduced power or limp mode
Possible increased fuel use
Frequent or failed regeneration attempts

💰 Repair Cost: DIY vs Shop

DIY Cost

$100-$1000

Shop Cost

$300-$3500

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2003

1Scan for related DPF and regeneration codes

2Check Bank 2 DPF pressure and temperature data

3Attempt a forced regeneration with a scan tool

4Inspect the exhaust and DPF for leaks or damage

❓ Frequently Asked Questions

Can I drive with a P2003 code?

Short-term yes, but a clogged DPF can trigger limp mode. Address it soon to avoid replacing the filter.

How much does it cost to fix P2003?

A regen or sensor may be modest, but a new DPF can cost several thousand at a shop.

What is the most common cause of P2003?

A clogged or ash-loaded DPF on Bank 2 is the most common cause.

🔗 Related Codes

P2002P2001P2463P242FP0430