2021 Kia P0305: What It Means & Is It Safe to Drive?
P0305 on the 2021 Kia: Cylinder 5 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainHigh urgency
What this code means
Misfire on cylinder 5—present on V6, V8, and inline-5 engines only. On V6 engines, cylinder 5 is sometimes harder to access; factor labor into repair estimates.
Common causes on the 2021 Kia
- Fouled spark plug
- Failed ignition coil
- Leaking or clogged injector
- Low compression from valve or ring wear
Symptoms
- Check Engine Light
- Engine shaking or rough idle
- Power loss under acceleration
Typical fixes
- Replace spark plug and coil on cylinder 5
- Test and replace injector if needed
- Compression and leak-down test
Repair cost range
For a 2021 Kia, repairs for P0305 typically fall between $150 and $1000, depending on the root cause and labor rates in your area.
Known issues on Kia
Kia Lambda V6 P0305 typically involves a failed coil or plug on cylinder 5. Less prone to the carbon buildup issues of the Theta-II four-cylinder—standard coil swap diagnosis applies.
Most commonly affected models
Sorento V6 3.3L 2011–2015Cadenza 3.3L 2014–2019K900 3.8L 2015–2019