P2002 means your diesel particulate filter is clogged with soot beyond the acceptable level and cannot clean itself through normal regeneration. The DPF traps harmful soot particles from diesel exhaust, but when it becomes overloaded, engine performance drops and backpressure builds to dangerous levels.
DTC/P2002·Peugeot
P2002 on Peugeot: Causes, Symptoms and Fix Cost
Quick Answer
High SeverityNot safe to drivePeugeot
P2002 on a Peugeot means your diesel particulate filter is clogged with soot beyond the acceptable level and cannot clean itself through normal regeneration. The DPF traps harmful soot particles from diesel exhaust, but when it becomes overloaded, engine performance drops and backpressure builds to dangerous levels.
Repair cost on Peugeot€66 - €3960
What does P2002 mean on a Peugeot?
Peugeot 308
2007-2024Peugeot 308 diesel models use an additive-based DPF system (Eolys/Infineum) that injects a cerium-based additive into the fuel to lower the soot combustion temperature. This system requires periodic additive refills (every 120,000 km or when the additive tank light appears). Running out of additive prevents regeneration entirely. The additive tank is located under the car near the fuel tank.
What causes P2002 on a Peugeot?
Beyond the generic causes listed on the main P2002 page, these are the Peugeot-specific patterns we see most often:
Peugeot 308Eolys/Infineum DPF additive tank empty
Peugeot 308Additive injection pump failure
Peugeot 308DPF temperature sensor failure on 1.6 HDi
How to diagnose P2002 on a Peugeot with OBD2
Follow these steps to pinpoint the root cause of P2002:
- Read freeze frame data and check the DPF soot loading percentage with a diagnostic scanner. Values above 80-85% indicate a severely blocked filter. Also note the km since last successful regeneration.
- Check the DPF differential pressure sensor readings with the engine running. Compare upstream versus downstream exhaust pressure. Excessively high differential pressure confirms a physical blockage, while normal pressure with a P2002 code suggests a sensor fault.
- Inspect the DPF temperature sensors (upstream and downstream). The upstream sensor should read 400-600 degrees Celsius during active regeneration. If temperatures are too low, the regeneration process cannot burn off soot effectively.
- Check for additional codes related to the EGR system, turbocharger, or fuel injectors. A malfunctioning EGR valve or leaking injector produces excess soot that overloads the DPF faster than it can regenerate.
- Attempt a forced (stationary) regeneration using a dealer-level diagnostic tool. If the regeneration completes and pressure drops to normal, the DPF is still functional but the driving pattern was preventing passive regeneration. If it fails, the DPF may need professional chemical cleaning or replacement.
- Check the engine oil specification. Diesel engines with DPFs require low-SAPS oil (typically ACEA C2 or C3). Standard oil produces ash that permanently blocks DPF cells and cannot be burned off during regeneration.
How much does P2002 cost to fix on a Peugeot? (EUR)
Estimated repair costs on a Peugeot (Peugeot parts and labour typically run 10% above the average for this code).
Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P2002 on Peugeot
These codes commonly cluster with P2002 on Peugeot vehicles:
FAQ: P2002 on Peugeot
What does P2002 mean on a diesel car?
P2002 means your diesel particulate filter (DPF) is clogged with soot and is not filtering efficiently. The DPF captures harmful soot from diesel exhaust and periodically burns it off through a process called regeneration. When this process fails repeatedly, soot accumulates beyond the threshold and this code is set.
Can I fix P2002 by driving on the motorway?
Sometimes. A sustained motorway drive at 2500-3000 RPM for 20-30 minutes can trigger passive regeneration and burn off soot. However, if the DPF is severely blocked (above 80% soot load), a forced regeneration with a diagnostic tool is usually needed instead.
How much does DPF replacement cost?
A new OEM DPF costs 800-3000 EUR depending on the vehicle, plus 200-600 EUR for fitting. Professional DPF cleaning (150-480 EUR) is a much cheaper alternative and can restore the filter if it is not physically damaged or ash-saturated.
Why does my DPF keep blocking?
The most common reason is driving habits. Short trips, city-only driving, and low engine loads prevent the exhaust from reaching the 500-600 degree Celsius temperature needed for regeneration. Other causes include faulty sensors, EGR problems, worn injectors, or using the wrong engine oil.
Is it legal to remove the DPF in Europe?
No. DPF removal or deletion is illegal in all EU countries. Vehicles with removed DPFs will fail emissions testing (MOT/TUV/ITV/CT) and can result in significant fines. The vehicle may also be refused insurance cover.
Looking for the full P2002 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P2002 guideSkanyx · Peugeot
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