P0174 on Toyota vehicles The engine is running lean on bank 2
P0174 is named on 45 Toyota model years (2016–2020): 57 manufacturer filings and 2 owner reports in NHTSA’s files, across Highlander, Sequoia, Tundra, Corolla, 4Runner and 8 more.
Which Toyota model years name P0174
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.
What Toyota owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
Checked code and got P0171 and P0174 which mean engine's air/fuel mixture becomes too lean for the Engine Control Module (ECM) to correct within its normal operating range there are many posts and threads about same issue on highlanders as…
Toyota filings that name P0174
Source: NHTSA manufacturer communicationsBulletins and campaigns Toyota filed with NHTSA whose summary names P0174. 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-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 Service Bulletin No. T-SB-0058-13 is obsolete and any printed versions should be discarded.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 P0174 means
Source: SAE J2012 / OBD-IIThe engine is running lean on bank 2.
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 P0174 a known problem on Toyota vehicles?
It is a documented one: NHTSA's files hold 57 manufacturer filings and 2 owner reports naming P0174 on 45 Toyota model years (2016–2020). 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 P0174 appear on most?
2019 Highlander (3 documents), 2018 Sequoia (3 documents), 2019 Tundra (3 documents).
Does P0174 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.