P2002 on Mazda
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
P2002 on Mazda vehicles indicates diesel particulate filter efficiency below threshold (bank 1). Au7o has documented this code across 1 Mazda model — most commonly on CX-60. 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.
Common Causes of P2002
- •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
P2002 on Mazda by Model
Mazda CX-60(1 issue)
- Diesel DPF Frequent Regeneration and Poor Economy on Short Trips2022-2025
3.3L diesel CX-60 owners report the diesel particulate filter (DPF) entering active regeneration very often, particularly on short/urban journeys where the exhaust never reaches full temperature. During a regen the engine injects extra fuel to burn off soot, driving instantaneous consumption up to ~15-17 L/100km and dropping average economy to the mid-20s mpg. Owners who do mostly short trips risk incomplete regens, a partially clogged DPF, and eventually a limp-mode/emissions warning. Mazda advises a periodic 30-45 minute higher-speed drive to complete a regen.
Looking for P2002 on a different make?
View P2002 across all makes →Frequently Asked Questions
What does P2002 mean on Mazda?▼
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 Mazda specifically, this code is documented across 1 model.
What causes P2002 on Mazda vehicles?▼
Common causes on Mazda: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2002 on a Mazda?▼
Repair costs vary widely depending on the root cause and specific Mazda model.
Which Mazda models have P2002 documented?▼
Au7o has documented P2002 on 1 Mazda model: CX-60.