# P0304 on the 2017 Honda Civic Type R

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 P0304

- [11024893](https://open.wenmarpro.com/bulletins/11024893), 2025-11-04: Service Bulletin \- Water could enter the hood scoop and accumulate down inside the no. 4 spark plug hole. This can corrode the ignition coil, plug tube, and spark plug, leading to a misfire to the no. 4 cylinder. If a misfire is detected, DTC P0304 is stored.
- [11022041](https://open.wenmarpro.com/bulletins/11022041), 2025-08-21: Service Bulletin \- Water could enter the hood scoop and accumulate down inside the no. 4 spark plug hole. This can corrode the ignition coil, plug tube, and spark plug, leading to a misfire to the no. 4 cylinder. If a misfire is detected, DTC P0304 is stored.
- [10242562](https://open.wenmarpro.com/bulletins/10242562), 2023-09-21: Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2021 Civic Type R with a customer complaint of the vehicle Malfunction Indicator Light \(MIL\) with DTC P0300 \(Random Misfire Detected\) and/or P0304 \(No. 4 Cylinder Misfire Detected\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [10241868](https://open.wenmarpro.com/bulletins/10241868), 2023-09-06: Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2021 Civic Type R with a customer complaint of the vehicle Malfunction Indicator Light \(MIL\) with DTC P0300 \(Random Misfire Detected\) and/or P0304 \(No. 4 Cylinder Misfire Detected\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [10240765](https://open.wenmarpro.com/bulletins/10240765), 2023-08-18: Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2021 Civic Type R with a customer complaint of the vehicle Malfunction Indicator Light \(MIL\) with DTC P0300 \(Random Misfire Detected\) and/or P0304 \(No. 4 Cylinder Misfire Detected\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [10240328](https://open.wenmarpro.com/bulletins/10240328), 2023-08-03: Dealer Message \-American Honda Motor Co., Inc. \(AHM\) is searching for certain 2017\-2021 Civic Type R with a customer complaint of the vehicle Malfunction Indicator Light \(MIL\) with DTC P0300 \(Random Misfire Detected\) and/or P0304 \(No. 4 Cylinder Misfire Detected\) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.