2016 Volvo P0304: What It Means & Is It Safe to Drive?
P0304 on the 2016 Volvo: Cylinder 4 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 confirmed on cylinder 4. On 4-cylinder engines, this is the last cylinder—check coil and plug first, then injector, then compression.
Common causes on the 2016 Volvo
- Worn spark plug on cylinder 4
- Failed ignition coil on cylinder 4
- Faulty or clogged fuel injector
- Low compression or valve issue
Symptoms
- Check Engine Light
- Rough idle and shaking
- Poor acceleration or power loss
Typical fixes
- Replace spark plug and COP coil on cylinder 4
- Clean or replace fuel injector
- Compression and leak-down test if basic parts check out
Repair cost range
For a 2016 Volvo, repairs for P0304 typically fall between $150 and $900, depending on the root cause and labor rates in your area.
Known issues on Volvo
Volvo T5 P0304 on cylinder 4 typically indicates a coil cassette failure or a worn spark plug. Cylinder 4 is near the turbocharger on B5254T engines—the additional heat can accelerate spark plug and coil wear on this cylinder. Replace the plug and test the cassette.
Most commonly affected models
S60 B5254T 2001–2009XC90 T6 B6294T 2003–2014C70 T5 2006–2013