P2002 on Toyota: How to Diagnose & Fix
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
1 Toyota model · 1 documented issue · 1 critical
P2002 on Toyota by model: symptoms, diagnosis and fix
The Australian DPF class action concerns certain Hilux, Prado and Fortuner vehicles with 1GD-FTV or 2GD-FTV engines acquired between 1 October 2015 and 23 April 2020. The defective exhaust after-treatment system could cause excessive white smoke, unpleasant exhaust odour, increased fuel use and repeated service visits. An effective repair became available free of charge in May 2020. The High Court's November 2024 judgment remitted assessment of damages; individual eligibility and compensation should be checked against current court notices.
Common Symptoms
- Thick white smoke from the exhaust, especially at idle or low speed
- Strong foul or acrid diesel smell in and around the vehicle
How to Fix
Ask Toyota to check the vehicle's VIN, repair history and applicability of the effective 2020 DPF field fix. Do not infer eligibility solely from registration year, or replace/clean the DPF without diagnosing the system. Follow the vehicle-specific owner's manual and technician instructions for warning lights and regeneration. Check current official class-action notices for any compensation claim.
Sources for this issue (5)
- DPF Class Action | Policies | Toyota Australiamanufacturer
- Toyota Australia loses DPF class action appeal - carsalesarticle
- Toyota HiLux, LandCruiser Prado gain diesel particulate filter regeneration switch - Drivearticle
- DPF blowing smoke, ECM update, Replacement etc - NewHilux.netforum
- Toyota-Club.Net - DTC list - 1GD-FTVarticle
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 Toyota?
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 Toyota it is documented across 1 model: Hilux.
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 Toyota?
Repair costs vary widely with the root cause and Toyota model; each issue on this page carries its own estimate where one is published.
Looking for P2002 on a different make?
View P2002 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.