DTC code

P0304: Cylinder 4 Misfire Detected

Vehicle-specific published guides for this diagnostic trouble code.

Cylinder 4 Misfire Detected

P0304 means the PCM has detected a possible misfire on cylinder 4.

Article vehicle: 2015-2025 Ford F150 2.7 EcoBoost

P0304 generally means the PCM has detected a possible misfire pattern on cylinder 4.

Article vehicle: 2019-2024 Ram 1500Classic 5.7HEMIGas

P0304 means the PCM may be detecting an uneven contribution from cylinder 4, often by watching crankshaft speed changes.

Article vehicle: 2019-2024 Ram 1500DT 5.7HEMIGas

P0304 may mean the PCM has detected a misfire pattern on cylinder 4.

Article vehicle: 2019-2025 Ram 1500DT 3.6PentastarGas

P0304 means the PCM may be detecting a misfire on cylinder 4.

Article vehicle: 2019-2025 Ram 2500HD 6.4HEMIGas