2012 Volvo P0305: What It Means & Is It Safe to Drive?
P0305 on the 2012 Volvo: 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.
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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 on the 2012 Volvo
- 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 2012 Volvo, repairs for P0305 typically fall between $150 and $1000, depending on the root cause and labor rates in your area.
Known issues on Volvo
Volvo B6294T inline-six P0305 is a standard COP failure or worn spark plug. On the T6 3.2L, cylinder 5 is toward the firewall—access is straightforward from above. Swap the COP to cylinder 1 and rescan to confirm the fault before replacing.
Most commonly affected models
XC90 T6 B6294T 2003–2014S80 T6 2007–2012XC70 T6 2008–2014