2020 Subaru P0305: What It Means & Is It Safe to Drive?
P0305 on the 2020 Subaru: 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 2020 Subaru
- 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 2020 Subaru, repairs for P0305 typically fall between $150 and $1000, depending on the root cause and labor rates in your area.
Known issues on Subaru
P0305 applies to Subaru's H6 flat-six. Individual coil failures on the H6 are uncommon. On high-mileage EZ30 engines, P0305 may indicate valve seat recession—always perform a compression test before ignition diagnosis.
Most commonly affected models
Outback H6 EZ30 2001–2009Legacy H6 EZ36 2008–2012Tribeca H6 2006–2007