P0171 on Infiniti vehicles The engine is running lean on bank 1: too much air, or not enough fuel, for the mixture the computer wants
P0171 is named on 13 Infiniti model years (2016–2019): 15 manufacturer filings and 0 owner reports in NHTSA’s files, across QX60, Q50, Q60, QX80.
Which Infiniti model years name P0171
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Infiniti QX60 | Equipment | 2 | — |
| 2017 Infiniti QX60 | Fuel/Propulsion System | 2 | — |
| 2019 Infiniti Q50 | Equipment | 1 | — |
| 2019 Infiniti Q60 | Fuel/Propulsion System | 1 | — |
| 2019 Infiniti QX60 | Fuel/Propulsion System | 1 | — |
| 2019 Infiniti QX80 | Equipment | 1 | — |
| 2018 Infiniti Q50 | Equipment | 1 | — |
| 2018 Infiniti Q60 | Fuel/Propulsion System | 1 | — |
| 2018 Infiniti QX80 | Equipment | 1 | — |
| 2017 Infiniti Q50 | Fuel/Propulsion System | 1 | — |
| 2017 Infiniti Q60 | Fuel/Propulsion System | 1 | — |
| 2017 Infiniti QX80 | Equipment | 1 | — |
| 2016 Infiniti QX60 | Fuel/Propulsion System | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Infiniti filings that name P0171
Source: NHTSA manufacturer communicationsBulletins and campaigns Infiniti filed with NHTSA whose summary names P0171. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- ITB19-007 Service bulletin2019-03-05 · Equipment
- INFINITI; P0171 AND P0174 SERVICE INFORMATION SERVICE INFORMATION Diagnosis for DTCs P0171 (FUEL SYS LEAN B1) and P0174 (FUEL SYS LEAN B2) have been revised for the APPLIED VEHICLES listed above. When performing diagnosis for either of these DTCs, start by using the SERVICE PROCEDURE section of this bulletin. NOTE: The related Electronic Service Manuals (ESM) will be revised in the future to
- ITB19-010 Service bulletin2019-04-04 · Fuel System, Gasoline — Fuel Injection System
- 2016-2018 QX60; MIL ON WITH DTC P2097, P2099, P0171 AND/OR P0174 This bulletin applies only to vehicles equipped with the VQ35DE engine only. IF YOU CONFIRM The MIL is ON with one or more of the following Air/Fuel (A/F) Sensor DTCs stored: - P0171 (Fuel Injection System Function) - P0174 (Fuel Injection System Function) - P2097 (A/F SENSOR 1) - P2099 (A/F SENSOR 1) ACTION 1. Perform t
What P0171 means
Source: SAE J2012 / OBD-IIThe engine is running lean on bank 1: too much air, or not enough fuel, for the mixture the computer wants.
A stored code names the test that failed, never the part that caused it. The record above is what Infiniti and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0171 a known problem on Infiniti vehicles?
It is a documented one: NHTSA's files hold 15 manufacturer filings and 0 owner reports naming P0171 on 13 Infiniti model years (2016–2019). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Infiniti models does P0171 appear on most?
2018 QX60 (2 documents), 2017 QX60 (2 documents), 2019 Q50 (1 document).
Does P0171 on a Infiniti mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.