P1605: owner reports and bulletins
Got P1605 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
12 complaints filed with NHTSA mention P1605, 12 of them since 2015, across 6 different models. The component owners most often filed it under: engine.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| TOYOTA RAV4 | 6 | 2015, 2018 |
Manufacturer service bulletins that name P1605
7 technical service bulletins and manufacturer communications filed with NHTSA mention P1605, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- TOYOTA HIGHLANDER (2014, 2015, 2016, 2017), bulletin 10162756: 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) (…
- TOYOTA SEQUOIA (2012, 2013, 2014, 2015), bulletin 10132332: TSB: Some 2012 ? 2015 model year Sequoia and Tundra vehicles with the 3UR-FBE engine may exhibit a MIL ?ON? condition with Diagnostic Trouble Codes (DTCs) P0171/P0174 (System too Lean Bank 1/ Bank 2), P0172/P0175 (System…
- SCION IQ (2012, 2013), bulletin 10132874: TSB: Some 2012 ? 2013 model year iQ vehicles may exhibit one or more of the following conditions: * Rough idle condition. * Idle speed momentarily drops at idle. * MIL ?ON? with one or more of the following DTCs: P1603, …
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.