2017 Kia P0300: What It Means & Is It Safe to Drive?
P0300 on the 2017 Kia: Random/Multiple Cylinder Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM has detected misfires across multiple cylinders. This can cause damage to the catalytic converter if driven for long.
Common causes on the 2017 Kia
- Worn spark plugs or ignition coils
- Clogged or bad fuel injectors
- Low compression
- Vacuum leak, bad MAF, or fuel delivery issue
Symptoms
- Check Engine Light (often flashing under load)
- Rough idle, shaking, loss of power
- Possible smell of unburned fuel
Typical fixes
- Replace spark plugs and coils as needed
- Clean or replace fuel injectors
- Fix vacuum/fuel issues
- Compression test if no obvious cause
Repair cost range
For a 2017 Kia, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Kia
Kia P0300 on Theta II 2.4L engines carries the same rod bearing recall concern as Hyundai—verify open recalls on the Kia VIN checker before diagnosing as a routine ignition issue. On Stinger 3.3T twin-turbo, P0300 under boost load suggests a failing ignition coil (individual coil-on-plug design); replace the specific coil(s) indicated. On Sportage and Tucson 2.4L NU GDI, carbon buildup on intake valves combined with short plug intervals is the most common P0300 cause.
Most commonly affected models