Particulate Trap Efficiency Below Threshold
The MAXXFORCE-P2002-11 (MaxxForce) diesel fault code means: Particulate Trap Efficiency Below Threshold. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- advanced
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What Are the Symptoms of MAXXFORCE-P2002-11?
- Check Engine light
- Possible visible smoke from the exhaust
What Causes MAXXFORCE-P2002-11? (Most Likely First)
- Cracked or melted filter substrate High
- Filter removed or replaced with a non-compliant part Medium
- Differential-pressure sensor or its sample lines reading wrong Medium
Can I Still Drive with MAXXFORCE-P2002-11?
Short distances only. MAXXFORCE-P2002-11 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P2002 mean on a MaxxForce?
P2002 means Particulate Trap Efficiency Below Threshold. The control module has determined the diesel particulate filter (bank 1) is not trapping soot as well as it should. On diesels this usually points to a cracked, melted or removed filter rather than a plugged one.
Is P2002 a MaxxForce-specific code?
No. P2002 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions Navistar uses to set it on its diesels are in Navistar service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose MAXXFORCE-P2002-11?
Check the DPF differential-pressure reading against specification at a set engine speed; a very low reading suggests a damaged filter.
Inspect the sensor sample lines for leaks or disconnection.
Look for soot at the filter outlet.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- California Code of Regulations, Title 13 section 1971.1 (Heavy-Duty OBD)malfunction criteria, section (e)
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