P2002 on Opel
Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
P2002 on Opel vehicles indicates diesel particulate filter efficiency below threshold (bank 1). Au7o has documented this code across 2 Opel models — most commonly on Combo, Mokka. 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 Opel range from $200 to $1,500, 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 Opel by Model
Opel Combo(1 issue)
- Diesel EGR valve and DPF clogging on short-journey use2018-2023
Combo diesels (1.5 BlueHDi) used mainly for short, low-speed urban trips suffer from EGR valve carbon build-up and diesel particulate filter (DPF) blockage. The engine never reaches the temperature needed for passive/active DPF regeneration, so soot accumulates. A clogged DPF raises exhaust back-pressure, which alters EGR flow, while a sooty EGR increases soot output, creating a feedback loop that produces multiple emissions faults at once. Symptoms include rough idle, power loss, higher fuel use and limp mode. This is a well-known characteristic of the PSA/Stellantis diesels shared with the Berlingo/Rifter.
Opel Mokka(1 issue)
- Diesel Particulate Filter (DPF) Clogging & Failed Regeneration2013-2019
On the CDTI diesel Mokka/Mokka X driven mainly on short city journeys, the DPF cannot reach the temperature needed for passive/active regeneration and progressively clogs with soot, often as early as 30,000-50,000 km. This produces reduced power, increased fuel use, repeated regeneration warnings and exhaust aftertreatment fault codes; a blocked DPF that never completes regeneration eventually needs forced regen or replacement. The issue is tightly linked to the EGR carbon problem on the same engines.
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What does P2002 mean on Opel?▼
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 Opel specifically, this code is documented across 2 models.
What causes P2002 on Opel vehicles?▼
Common causes on Opel: 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 Opel?▼
Repair costs on Opel range from $200 to $1,500, depending on the specific model and root cause.
Which Opel models have P2002 documented?▼
Au7o has documented P2002 on 2 Opel models: Combo, Mokka.