2015 Volvo P0300: What It Means & Is It Safe to Drive?
P0300 on the 2015 Volvo: 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 2015 Volvo
- 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 2015 Volvo, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Volvo
Volvo P0300 on B5254T T5 five-cylinder engines—earlier models (pre-2007) use a single coil cassette covering all five cylinders; cassette failure results in P0300 across all cylinders. Replace the entire cassette as a unit. On 2007+ T5 models with individual coil-on-plug design, individual coil failures are more common. On B5254T2 and B5254T9 engines, P0300 following oil consumption indicates worn piston rings; Volvo had a piston ring replacement program on some affected B5254 engines.
Most commonly affected models