Peugeot 3008
Treat the 3008 as two different cars: PureTech petrol (air/fuel/boost logic) and BlueHDi diesel (emissions plausibility). This page keeps you out of the usual traps.
Quick triage (10 minutes)
Capture first
- Codes + freeze-frame
- Battery voltage and charging behaviour (low voltage creates false cascades)
- STFT/LTFT (petrol) or EGR/DPF live data (diesel)
- MAP/boost actual vs requested (petrol turbo)
- DPF differential pressure + regen history (diesel)
Fast separation
- Petrol rough idle/hesitation → trims, intake/PCV leaks, boost leaks, coil events.
- Diesel limp with emissions codes → plausibility: EGR flow, DPF loading, NOx/AdBlue system status.
- After a battery change issues → confirm sensor relearns/adaptations before condemning parts.
- Intermittent warnings → look for voltage dips, wheel speed plausibility, and ground points.
Common 3008 complaints (and what usually causes them)
- Petrol hesitation under load: treat as boost/air-measurement until proven otherwise. A small charge leak can trigger underboost and lean codes together.
- Rough idle or random misfire (petrol): check trims + misfire counters. Don’t start with injectors unless trims and ignition prove it.
- Diesel “emissions fault” + limp: start with EGR plausibility and DPF loading (diff pressure vs calculated soot). Many parts get replaced because the basic data was never checked.
- DPF regens too frequent: root cause is often driving pattern + upstream fuelling/EGR issues, not a “bad DPF”.
What NOT to do (high-confidence traps)
- Don’t replace a turbo for underboost until you’ve pressure-tested the charge system and checked requested vs actual boost.
- Don’t replace a DPF based on a single code. Confirm differential pressure trend and regen behaviour first.
- Don’t assume “AdBlue fault” = tank. Check wiring, dosing plausibility and sensor feedback before spending money.
Typical OBD2 codes you’ll see
P0171
Lean Bank 1 (petrol): trims-first workflow.
P0300
Random misfire: counters + mixture separation.
P0299
Underboost: leak vs control vs sensor bias.
P2002
DPF efficiency: confirm loading + regen logic.
Simple “prove it” checks
Petrol (PureTech)
- Trims at idle vs 2,000 rpm: idle-only lean points to intake/PCV leaks.
- Boost requested vs actual: divergence under load suggests leak/control.
- Misfire counters: correlate to load and mixture (don’t guess).
Diesel (BlueHDi)
- DPF diff pressure trend: compare at idle and at 2,500 rpm.
- EGR command vs measured flow: plausibility beats guesswork.
- Regen history: frequent aborts point to temperature/usage problems.
Best workflow: separate petrol vs diesel logic first, then log live data for one short drive. If the ECU is adding fuel, pulling torque, or failing plausibility, the data will tell you quickly.
Trust note: These profiles are designed to narrow possibilities. Confirm with test data (trims, misfire counters, pressure/smoke tests, voltage checks) before buying parts.