Nissan Rogue P0171: System Too Lean (Bank 1)
TL;DR
Nissan Rogue P0171: usually a vacuum/intake-manifold leak or a dirty MAF sensor on the 2.5L QR25DE. Smoke-test the intake and clean the MAF. Typical shop cost: €100–€450 depending on the leak source.
Why Nissan Rogue owners get P0171
The Rogue’s QR25DE port-injected engine tends to set P0171 from small intake leaks — manifold gaskets, PCV hoses, or cracked intake tubing — and from a contaminated MAF sensor reading low airflow. These are measurement/leak issues rather than fuel-delivery faults, so a smoke test plus MAF cleaning resolves the majority of cases at moderate cost.
Most likely causes on the Rogue
| Likely cause | Probability | Notes |
|---|---|---|
| Vacuum / intake-manifold gasket leak | 40% | |
| Dirty MAF sensor | 35% | Clean and re-check fuel trims |
| PCV hose or intake-tube crack | 25% |
Nissan Rogue-specific known issues
- Intake-manifold and PCV hose leaks are common P0171 sources on the QR25 engine.
- A dirty MAF sensor frequently causes lean trims and is cheap to clean.
- Check for cracked intake tubing after any recent air-filter or intake service.
Nissan Rogue P0171 repair cost
| Typical shop cost (Rogue) | $100–$450 |
|---|---|
| DIY range (generic) | $0–$400 |
Ranges vary by region, engine and parts grade.
Owner tips
- Clean the MAF sensor first — it is the cheapest likely fix.
- Smoke-test the intake to find manifold and hose leaks.
- Inspect intake tubing for cracks if the code followed recent service.
Full P0171 diagnostic guide
For the complete step-by-step diagnosis, all causes, and repair walkthrough that applies to every vehicle, see the main guide: P0171 — System Too Lean (Bank 1).
Nissan Rogue P0171 — FAQ
What causes P0171 on a Nissan Rogue?
Usually a vacuum or intake-manifold leak letting in unmetered air, or a dirty MAF sensor under-reporting airflow on the 2.5L QR25 engine. Both are moderate-cost fixes.
How much is a Rogue P0171 repair?
Typically €100–€450 at a shop, depending on whether it is MAF cleaning, a vacuum hose, or an intake-manifold gasket.
Is it safe to drive a Rogue with P0171?
Short-term yes if it runs well, but a lean mixture can cause rough idle and eventually misfires, so address the leak soon.