# P0303 on the 2023 Ram 1500

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 P0303

- [11028769](https://open.wenmarpro.com/bulletins/11028769), 2026-02-12: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0300\-00 \- Multiple Cylinder Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0301\-00 \- Cylinder 1 Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0302\-00 \- Cylinder 2 Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0303\-00 \- Cylinder 3 Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0304\-00 \- Cylinder 4 Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0305\-00 \- Cylinder 5 Misfire \- in Active or Stored status set during cold start catalyst heating. ● P0306\-00 \- Cylinder 6 Misfire \- in Active or Stored status set during cold start catalyst heating. Customers may comment on one or more of the following: ● Vehicle has a rough idle. ● Engine has a miss. ● Noisy valvetrain. This bulletin involves reprogramming the PCM with the latest available software.
- [11018482](https://open.wenmarpro.com/bulletins/11018482), 2025-05-20: "Misfire Diagnostic Trouble Codes \(DTCs\), Rough Idle, Valvetrain Noise Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P0301 \- Cylinder 1 Misfire. ● P0302 \- Cylinder 2 Misfire. ● P0303 \- Cylinder 3 Misfire. ● P0304 \- Cylinder 4 Misfire. ● P0305 \- Cylinder 5 Misfire. ● P0306 \- Cylinder 6 Misfire. Customers may comment on one or more of the following: ● Rough idle. ● Valvetrain noise. "
- [10251871](https://open.wenmarpro.com/bulletins/10251871), 2024-03-18: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ? P0301 \- Cylinder 1 Misfire. ? P0302 \- Cylinder 2 Misfire. ? P0303 \- Cylinder 3 Misfire. ? P0304 \- Cylinder 4 Misfire. ? P0305 \- Cylinder 5 Misfire. ? P0306 \- Cylinder 6 Misfire. ? P0307 \- Cylinder 7 Misfire. ? P0308 \- Cylinder 8 Misfire. Customers may also experience the following: ? An engine misfire This bulletin involves reprogramming the PCM with the latest available software.