P0301high severityPowertrain
Cylinder 1 Misfire Detected
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
The PCM has detected a misfire condition specifically in cylinder 1.
Symptoms
- Check Engine Light
- Rough idle
- Vibration
- Loss of power
- Fuel smell from exhaust
- Poor fuel economy
Common causes
- Worn or fouled spark plug #1
- Faulty ignition coil #1
- Damaged spark plug wire
- Faulty fuel injector #1
- Low compression cylinder 1
- Vacuum leak near cylinder 1
Diagnostic steps
- Swap ignition coil #1 with another cylinder to see if misfire follows
- Inspect spark plug #1
- Test fuel injector #1
- Check compression cylinder 1
- Check for vacuum leaks near cylinder 1
Repair notes
Try swapping coil first. If misfire follows the coil, replace it. If not, check plug, injector, then compression.
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1