# U3003 on the 2021 Ford F\-450

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name U3003

- [10235151](https://open.wenmarpro.com/bulletins/10235151), 2023-05-04: Some 2020\-2022 F\-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti\-lock braking system \(ABS\) indicator with diagnostic trouble codes \(DTCs\) C0020 and U3003 in the ABS module. This may be a result of water/moisture intrusion into the battery junction box \(BJB\). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure to inspect for water/moisture intrusion into the BJB and replace the BJB and cover if water/moisture intrusion is found.
- [10226938](https://open.wenmarpro.com/bulletins/10226938), 2022-12-02: This article supersedes TSB 22\-2313 to update the Parts List, Service Procedure, and vehicle production fix dates. Some 2020\-2022 F\-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti\-lock braking system \(ABS\) indicator with diagnostic trouble codes \(DTCs\) C0020 and U3003 in the ABS module. This may be a result of water/moisture intrusion into the battery junction box \(BJB\). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure to inspect for water/moisture intrusion into the BJB and replace the BJB and cover if water/moisture intrusion is found.
- [10208141](https://open.wenmarpro.com/bulletins/10208141), 2022-02-23: Some 2020\-2022 F\-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti\-lock braking system \(ABS\) indicator with diagnostic trouble codes \(DTCs\) C0020 and U3003 in the ABS module. The vehicle may not shift out of park \(P\) and/or have continuously illuminated brake lamps with DTCs P0504 and/or C0040. This may be a result of water/moisture intrusion into the battery junction box \(BJB\). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure steps to inspect for water/moisture intrusion into the BJB and replace the BJB if water/moisture intrusion is found.
- [10206844](https://open.wenmarpro.com/bulletins/10206844), 2022-02-04: Some 2020\-2022 F\-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti\-lock braking system \(ABS\) Indicator with DTCs C0020 and U3003 in the ABS module. This may be a result of water/moisture intrusion into the battery junction box \(BJB\). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure steps to inspect for water/moisture intrusion into the BJB and replace the BJB if water/moisture intrusion is found.
- [10200732](https://open.wenmarpro.com/bulletins/10200732), 2021-09-02: Some 2020\-2021 F\-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti\-lock braking system \(ABS\) Indicator with DTCs C0020 and U3003 in the ABS module. This may be a result of water/moisture intrusion into the battery junction box \(BJB\). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure steps to inspect for water/moisture intrusion into the BJB and replace the BJB if water/moisture intrusion is found.