Diesel Particulate Filter Efficiency Below Threshold Bank 1
The P2002 code indicates that the diesel particulate filter (DPF) is not trapping soot effectively, often due to clogging or a failure in the regeneration process. This reduces exhaust filtration efficiency and can lead to increased emissions and potential engine performance issues.
01. Most Common Causes
- Clogged DPF due to excessive soot buildup
- Faulty DPF pressure sensor or wiring
- Incomplete DPF regeneration cycles
- Exhaust leaks before or after the DPF
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power and acceleration
- Increased fuel consumption
- Excessive exhaust smoke
03. Step-by-Step Diagnosis
Step 1: Scan for codes and check freeze frame data to confirm P2002.
Step 2: Inspect DPF pressure sensor and wiring for damage or loose connections.
Step 3: Perform a forced DPF regeneration using a scan tool to clear soot buildup.
Step 4: Check for exhaust leaks and repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Driving short distances may be possible, but prolonged driving can cause severe DPF clogging and expensive damage. It's best to address the issue promptly.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. If DPF replacement is needed, it can range from $1,000 to $4,000 depending on the vehicle.