P0171 on Toyota 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 47 Toyota model years (2016–2022): 62 manufacturer filings and 8 owner reports in NHTSA’s files, across Highlander, Sequoia, Tundra, Camry, Corolla and 8 more.
Which Toyota model years name P0171
Source: NHTSA manufacturer communications and complaintsA 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.
Toyota filings that name P0171
Source: NHTSA manufacturer communicationsBulletins and campaigns Toyota 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.
- TSB000923 Service bulletin2023-02-09 · Equipment
- TSB: Some 2014 ? 2020 model year Toyota vehicles may exhibit a hard start and/or MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): ?DTC P0171 and/or P0174 (System Too Lean Bank 1/Bank 2) ?DTC P0087 Fuel Rail / System Pressure ? Too Low Techstream data list analysis may reveal positive fuel trims including a no pressure condition verified by a manual fuel p
- T-TT-0462-17 Service bulletin2017-11-14 · Fuel System, Other — Storage — Tank Assembly — Pressure Relief Devices
- T-TT: Vehicles may experience various drivability concerns. Upon diagnosis, technicians commonly find no or low fuel pressure as well as a variety of DTCs (Commonly P1603, P1604, P1605, P0171, P0300, P0302, P0304, U0100). Technicians find that the cause this condition is corrosion and water in the A43 ECM connector (Fig 1). In several cases, it was found that the source of water was from aftermark
- T-SB-0072-19 Service bulletin2019-06-24 · Electrical System
- TSB: Some 2014 ? 2018 model year Highlander and Highlander Hybrid vehicles may exhibit one or more of the following conditions. ? Various drivability concerns ? Low or no fuel pressure ? Diagnostic Trouble Codes (DTCs) (Including but not limited to P1603, P1604, P1605, P0171, P0300, P0302, P0304, U0100) ? Some 2014 ? 2018 model year Highlander Hybrid vehicles may exhibit DTC P134A. These conditio
- T-SB-0166-19 Service bulletin2019-12-06 · Engine
- TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0058-13. Service Bulletin No. T-SB-0058-13 is obsolete and any printed versions should be discarded. Some 2009 ? 2018 model year Sequoia and 2009 ? 2019 model year Tundra vehicles equipped with a 3UR-FBE engine may exhibit a hard start and/or MIL ON condition with one or more of the following D
- T-SB-0166-19_Rev Service bulletin2020-01-23 · Engine And Engine Cooling
- TSB: REVISION NOTICE January 23, 2020 Rev1: G1439 The Parts Information, Calibration Information, and Repair Procedure sections have been updated. SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0058-13. Service Bulletin No. T-SB-0058-13 is obsolete and any printed versions should be discarded. Some 2009 ? 2018 model year Sequoia and 2009 ? 2019
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 Toyota 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 Toyota vehicles?
It is a documented one: NHTSA's files hold 62 manufacturer filings and 8 owner reports naming P0171 on 47 Toyota model years (2016–2022). 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 Toyota models does P0171 appear on most?
2019 Highlander (3 documents), 2017 Highlander (3 documents), 2018 Sequoia (3 documents).
Does P0171 on a Toyota 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.