P2002: Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
36 vehicles · 15 makes · $60-$12,000 repair
Most Reported On
P2002 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2010-2020 Land Rover Discovery, 2014-2025 Mercedes-Benz Sprinter (Sprinter 1500, Sprinter 2500, Sprinter 3500, Sprinter 4500), and 2014-2022 Land Rover Range Rover Sport, plus 33 other vehicles, with repair costs ranging from $60 to $12,000.
Common Causes
Typical Repair Cost
Based on 38 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2002, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (36)
Diesel Particulate Filter (DPF) Regeneration Issues
Diesel DPF Regeneration Failure in Short-Trip Driving
DPF / EGR / VNT Turbo Carbon-Choke (2.2 EU5 Emissions Trio)
DEF/AdBlue SCR System Faults and Derate
Diesel Particulate Filter (DPF) Clogging from Short-Trip / Urban Use
Diesel EGR/DPF Clogging & AdBlue (SCR) System Faults (OM651/OM654)
Diesel Particulate Filter (DPF) Blockage and Limp Mode on Short Trips
DPF Regeneration Failure / Blockage (Short-Trip Use)
OM651 Diesel DPF and EGR Clogging (B180 CDI / B200 CDI)
OM656 Diesel Emissions System Clogging (EGR/DPF/AdBlue SCR) and Limp Mode
DPF Clogging and AdBlue/SCR System Faults on 2.0 TDI Diesels
1.6 TDI (EA189) Dieselgate Recall and Post-Fix EGR/DPF Failures
2.0 TDI (EA189) EGR cooler cracking and DPF blockage
Diesel particulate filter (DPF) clogging and regeneration failure
1.6 TDI DPF clogging and oil dilution on short-journey use
2.0 TDI EGR System and DPF Failure
DPF blockage from short-journey/urban use
2.0 TDI diesel particulate filter (DPF) and EGR clogging
EA888 Direct-Injection Carbon Buildup on Intake Valves
DPF Clogging (TDI Diesel)
TDI diesel DPF clogging / EGR contamination on short journeys
DPF Clogging and EGR-Induced Limp Mode (diesel)
FAQ
What does P2002 mean?
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.
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?
Repair costs for P2002 range from $60 to $12,000, depending on the vehicle and root cause.
Which vehicles are affected by P2002?
Au7o has documented P2002 across 36 vehicle models from 15 manufacturers: Citroen, Ford, GMC, Land Rover, Mazda, Mercedes-Benz, Opel, Peugeot, Porsche, Renault, SEAT, Skoda, Suzuki, Volkswagen, Volvo.
Sources (12)
- ForumFord Fiesta TCDI 2016 DPF Regeneration — Ford Owners Club
- articleFord Diesel Particulate Filter DPF FAQ — Fiesta / Focus / Mondeo
- ForumDPF regeneration cycle - Mazda CX-70 Forum
- articleP2002 on 2014-2019 Mercedes-Benz Sprinter 3.0L V6: DPF Efficiency — Go-Parts
- articleSprinter DPF System Engineering Guide — DVA Mechanics
- ForumAdblue system fault | Skoda Kodiaq SUV Forum
- ForumSkoda Kodiaq 2.0 TDI problems with DPF regeneration | MyCarly Community
- articleDPF warning light ON in Skoda Kodiaq. What to check? | DailyDriven
- articleDieselgate: how the emissions fix affects your DPF in VW/Audi/Skoda/SEAT (Hypermiler)
- ForumHelp Please EGR valve Seat Leon 1.6 TDI (2011) (SEATCUPRA.NET)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.