P0734: owner reports and bulletins
Got P0734 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
27 complaints filed with NHTSA mention P0734, 20 of them since 2015, across 18 different models. The component owners most often filed it under: power train.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| FORD F-150 | 7 | 2017, 2018, 2020 |
| CHRYSLER TOWN AND COUNTRY | 3 | 2011, 2016 |
Manufacturer service bulletins that name P0734
98 technical service bulletins and manufacturer communications filed with NHTSA mention P0734, from 10 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- RAM 3500 (2024), bulletin 11009478: "Rear Selective Thrust Washer Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): P0218-00 - Tr…
- RAM 2500 (2024), bulletin 11010661: "Rear Selective Thrust Washer Failure Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following DTCs: P0218-00 - Transmission High Temperature O…
- FORD EXPEDITION (2018, 2019, 2020, 2021), bulletin 10234596: Some 2017-2020 F-150, 2018-2021 Expedition/Navigator/Mustang and 2019-2023 Ranger vehicles equipped with a 10R80 automatic transmission may exhibit a harsh engagement/harsh shift/delayed shift. It is possible the vehicle…
- LINCOLN NAVIGATOR (2018, 2019, 2020, 2021), bulletin 10236680: Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or wi…
- FORD TRANSIT (2020, 2021, 2022, 2023), bulletin 10236680: Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or wi…
- LINCOLN AVIATOR (2020, 2021, 2022, 2023), bulletin 10241447: This article supersedes TSB 22-2428 and 23-2176 to update the Issue, Action and Service Procedure. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 20…
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.