P2002 Fault Code

Diesel Particulate Filter Efficiency Below Threshold Bank 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2002 fault code indicates that the diesel particulate filter (DPF) efficiency is below the threshold for Bank 1. This typically means that the DPF is not effectively capturing and filtering out soot and particulate matter from the engine's exhaust. As a result, harmful emissions may be released into the atmosphere, causing the vehicle to fail emissions tests and leading to potential damage to the engine over time.

What are the symptoms of the P2002 code?

Common symptoms associated with the P2002 code may include:

• Decreased engine performance
• A noticeable increase in exhaust smoke
• Warning lights illuminated on the dashboard, particularly the check engine light
• Strong odors of unburned fuel or excessive soot in the exhaust
• Failed emissions tests

What causes the P2002 code?

Several factors can contribute to this issue, including:

• Clogged or damaged diesel particulate filter
• Faulty DPF pressure sensors
• Poor fuel quality or incorrect fuel
• Issues with the engine management system such as improper fuel injection or combustion problems
• Excessive oil consumption leading to soot buildup

How to fix P2002?

To address the P2002 fault code, it is essential to:

• Inspect the DPF for any signs of clogging or damage and clean or replace it if necessary
• Check the DPF pressure sensors for proper operation and replace them if they are faulty
• Ensure that the engine is tuned correctly and that there are no underlying issues affecting combustion
• Use high-quality diesel fuel to minimize deposits and ensure proper combustion
• Perform a forced regeneration of the DPF if equipped, to clear accumulated soot