What does code P0305 mean on a Kia and is it safe to drive?
P0305: Cylinder 5 Misfire Detected. Here's what it means on your Kia, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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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 for your 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 Kia, repairs for P0305 often fall between $150 and $1000, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
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