P1605 on Toyota vehicles
P1605 is named on 5 Toyota model years (2016–2018): 5 manufacturer filings and 5 owner reports in NHTSA’s files, across RAV4, Highlander, Corolla.
Which Toyota model years name P1605
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Toyota RAV4 | Electrical System | — | 4 |
| 2017 Toyota Highlander | Fuel/Propulsion System | 2 | — |
| 2016 Toyota Highlander | Fuel/Propulsion System | 2 | — |
| 2018 Toyota Highlander | Electrical System | 1 | — |
| 2017 Toyota Corolla | Engine | — | 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.
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.
3 trouble codes were recorded p1603(engine stall), P1604 startability malfunction, and p1605(rough idling), however they were unable to determine root cause of stalling and refused to keep my car to do further analysis despite the fact…
Toyota filings that name P1605
Source: NHTSA manufacturer communicationsBulletins and campaigns Toyota filed with NHTSA whose summary names P1605. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 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
What P1605 means
Source: SAE J2012 / OBD-IIP1605 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
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 P1605 a known problem on Toyota vehicles?
It is a documented one: NHTSA's files hold 5 manufacturer filings and 5 owner reports naming P1605 on 5 Toyota model years (2016–2018). 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 P1605 appear on most?
2018 RAV4 (4 documents), 2017 Highlander (2 documents), 2016 Highlander (2 documents).
Does P1605 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.