P2002 on Mercedes-Benz
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
P2002 on Mercedes-Benz vehicles indicates diesel particulate filter efficiency below threshold (bank 1). Au7o has documented this code across 1 Mercedes-Benz model — most commonly on Sprinter. 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. Typical repair costs on Mercedes-Benz range from $500 to $3,500, depending on the specific model and root cause.
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 Mercedes-Benz by Model
Mercedes-Benz Sprinter(1 issue)
- DEF/AdBlue SCR System Faults and Derate2014-2025
The Sprinter diesel exhaust fluid (DEF/AdBlue) selective catalytic reduction system is plagued by faults in the dosing module, NOx sensors, DEF heater, and SCR catalyst. Failures trigger the dreaded "engine derate" countdown that limits vehicle speed to 5 mph if not resolved, stranding commercial vehicles. The system is sensitive to DEF quality and cold weather.
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View P2002 across all makes →Frequently Asked Questions
What does P2002 mean on Mercedes-Benz?▼
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 Mercedes-Benz specifically, this code is documented across 1 model.
What causes P2002 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: 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 Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $500 to $3,500, depending on the specific model and root cause.
Which Mercedes-Benz models have P2002 documented?▼
Au7o has documented P2002 on 1 Mercedes-Benz model: Sprinter.