P0312high severityPowertrain
Cylinder 12 Misfire Detected
on 2009 Kia Optima 2.4L I4 · FWD
What this code means
Misfire detected in cylinder 12.
Symptoms
- Check Engine Light
- Rough idle
Common causes
- Worn plug #12
- Faulty coil
- Faulty injector
Diagnostic steps
- Swap coil
- Inspect plug
- Test injector
Repair notes
Diagnose cylinder 12.
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