OBD codes / P0171 / Nissan Rogue
P0171 on a Nissan Rogue
System Too Lean (Bank 1)
QR25 Rogue.
What P0171 usually means on a Rogue
P0171 shows the Rogue adding fuel to correct a lean mixture. As on other Nissans, a dirty or failing MAF sensor is a leading cause, along with vacuum and intake leaks. Fuel trims climbing well into positive double digits confirm it, often with a rough cold idle. A MAF cleaning or a smoke test resolves most cases.
Most likely causes on this model
- Dirty or failing MAF sensor
Nissan MAF sensors are a known weak point; a contaminated one leans the mixture.
- Vacuum or PCV leak
Cracked hoses are common lean causes on aging Rogues.
- Intake or air-box leak
Unmetered air after the sensor drives trims lean.
- Weak fuel delivery
A failing pump starves the engine under load.
What it costs on a Rogue
Cleaning the MAF is nearly free and sometimes fixes it; a replacement is a moderate Nissan part. A smoke test to find leaks is the smart next spend. Fuel-pump faults are the pricier, less common cause.
Year, engine and mileage change the answer. Get a diagnosis for your Rogue — it weighs these causes against your exact configuration and real complaint data.
Diagnose my Rogue free →Other codes we cover on the Nissan Rogue
Related symptoms
Nissan Rogue problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0171 behavior is covered on the main P0171 page. Confirm with a scan tool before buying parts.