P2002 on Citroen: How to Diagnose & Fix
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
1 Citroen model · 1 documented issue · 1 critical · $300-$2,500 repair
P2002 on Citroen by model: symptoms, diagnosis and fix
The Berlingo diesel DPF blocks prematurely when used for short urban journeys and commercial delivery work. The van duty cycle of frequent stops and starts prevents the DPF from reaching regeneration temperature.
Common Symptoms
- DPF warning light
- Loss of power
- Limp mode
- Excessive soot from exhaust
How to Fix
Schedule regular forced regenerations as part of fleet maintenance. Ensure Eolys additive is maintained. Plan daily route to include sustained higher-speed running.
Sources for this issue (2)
P2002 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2002 mean on a Citroen?
P2002 stands for "Diesel Particulate Filter Efficiency Below Threshold (Bank 1)." P2002 indicates that the diesel particulate filter (DPF) on bank 1 is performing below its required efficiency threshold. The DPF captures and stores soot from diesel exhaust and periodically burns it off (regeneration); the engine computer monitors exhaust pressure across the filter and other data to judge how well it's trapping and clearing soot. When that efficiency falls too low, this code sets. Symptoms can include reduced power, a clogged-filter warning, frequent or failed regenerations, and increased emissions. On Citroen it is documented across 1 model: Berlingo.
What are the most common causes of P2002?
The most common causes of P2002 are: Clogged or damaged diesel particulate filter, Failed or incomplete DPF regeneration (mostly short trips), Faulty differential (DPF) pressure sensor or hoses, Faulty exhaust temperature sensor(s), Exhaust leak before or across the DPF, Engine running issues causing excess soot (injectors, EGR, turbo), Use of incorrect (non-low-ash) engine oil or fuel quality issues. The specific cause varies by vehicle.
How much does it cost to fix P2002 on a Citroen?
Published repair estimates on Citroen range from $300 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P2002 on a different make?
View P2002 across all makes →Join 700+ subscribers following Au7o for vehicle insights and updates.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.