P0304
Cylinder 4 Misfire Detected
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
High SeverityPowertrainGeneric (SAE)
Description
Misfire detected in cylinder 4.
Symptoms
- Check Engine Light
- Rough idle
- Vibration
- Loss of power
Common Causes
- Worn spark plug #4
- Faulty ignition coil #4
- Faulty injector #4
- Low compression cyl 4
Diagnostic Steps
- Swap coil #4
- Inspect spark plug #4
- Test injector #4
- Check compression
Repair Notes
Swap coil to diagnose.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0304 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code P0304 mean on a 2018-2025 Fiat Cronos?
P0304 stands for "Cylinder 4 Misfire Detected". Misfire detected in cylinder 4.
What are the symptoms of P0304 on a Fiat Cronos?
Common symptoms of P0304 include: Check Engine Light, Rough idle, Vibration, Loss of power.
What causes P0304 on a 2018-2025 Fiat Cronos?
Common causes of P0304 include: Worn spark plug #4, Faulty ignition coil #4, Faulty injector #4, Low compression cyl 4.