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Dieseljunky2, Ford Mechanic
Category: Ford
Satisfied Customers: 3946
Experience:  ASE Certified, Ford Certified, Cummins Certified, & 20+ years in field experience
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i have a 2008 f250 6.4 diesel (the check engine light is on

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i have a 2008 f250 6.4 diesel (the check engine light is on and the trouble code is P2002 ). particulate trap efficiency below threshold. can you explain what this means in english. PLEASE!!!! THANK,S
Hello, does the truck have any aftermarket exhaust parts installed, or intake parts (like air filter)? Thanks
Customer: replied 7 years ago.
everything is stock on the exhuast but i do have an aftermarket cold air intake(s+b is the make)
How long in time and miles ha the intake been on the truck?
Customer: replied 7 years ago.
less than a week .maybe 50 miles or less

That could be causing the problem. What is happening is that the computer is not seeing the correct pressure resistance in the exhaust system. Different air filters change the air flow rate from what the computer is expecting to see. Below is the code description chart from the manual. I would suggest to clear the code and reinstall your factory air filter and see if the code comes back. This would either prove the air filter was the problem or eliminate it as a cause. You will need to print this if you want to keep it, as the website will remove it in a little while. Thanks


P2002 - Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

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