# C0020 on the 2020 Ford F\-600

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 C0020

- [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.