P2002: Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
25 vehicles · 11 makes · $60-$3,500 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 22 other vehicles, with repair costs ranging from $60 to $3,500.
Common Causes
Typical Repair Cost
Based on 25 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (25)
DEF/AdBlue SCR System Faults and Derate
Diesel Particulate Filter (DPF) Blockage and Limp Mode on Short Trips
DPF Regeneration Failure / Blockage (Short-Trip Use)
Diesel EGR/DPF Clogging & AdBlue (SCR) System Faults (OM651/OM654)
EA888 Direct-Injection Carbon Buildup on Intake Valves
TDI diesel DPF clogging / EGR contamination on short journeys
DPF Clogging and EGR-Induced Limp Mode (diesel)
DPF Clogging (TDI 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 $3,500, depending on the vehicle and root cause.
Which vehicles are affected by P2002?
Au7o has documented P2002 across 25 vehicle models from 11 manufacturers: Audi, Citroen, GMC, Land Rover, Mercedes-Benz, Opel, Peugeot, Renault, Skoda, Suzuki, Volkswagen.
Sources (12)
- resourceMyTurboDiesel - DPF/Adblue FAQ
- ForumTDIClub - Best fuel or additive to prevent DPF clogging
- articleEA888 Engine Series — Dealing with Carbon Buildup - eEuroparts
- articleCommon problems and issues on the 2.0 TFSi EA888 engines - TorqueCars
- ForumMokka CDTI, nice car but DPF issues - Vauxhall Mokka Forums
- articleOpel Mokka X: common problems and faults - AUTODOC
- articleCommon Problems with Audi Q2 — ClickMechanic Blog
- articleDPF Problems Solved: Regeneration, Cleaning, Replacement (VW/Audi diesel) — WW Spares
- articleShort Trips and DPF Problems Explained - lonestarperformance.co.uk
- articleOpel Combo - Common problems (EGR clogging, rough idle, power loss) - car-recalls.eu
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.