P0301 on Volvo
Cylinder 1 Misfire Detected
P0301 on Volvo vehicles indicates cylinder 1 misfire detected. Au7o has documented this code across 1 Volvo model — most commonly on C30. P0301 means the engine computer detected a misfire specifically in cylinder 1 — the spark didn't ignite the fuel properly, or the fuel/air mix didn't burn as it should. The computer detects this by sensing tiny variations in crankshaft speed each time a cylinder fires. A misfire wastes fuel, raises emissions, and can damage the catalytic converter if it's severe or persistent (a flashing check engine light usually warns of active, converter-damaging misfires). Because the code points to one specific cylinder, the cause is usually an ignition, fuel, or compression problem isolated to that cylinder. Typical repair costs on Volvo range from $100 to $500, depending on the specific model and root cause.
Common Causes of P0301
- •Worn or fouled spark plug in cylinder 1
- •Failed ignition coil or coil pack for cylinder 1
- •Faulty or clogged fuel injector for cylinder 1
- •Vacuum or intake air leak affecting that cylinder
- •Bad spark plug wire (on applicable engines)
- •Low compression (worn rings, leaking or burnt valve, head gasket)
- •Carbon buildup on intake valves
- •Wiring or connector fault to the coil or injector
P0301 on Volvo by Model
Volvo C30(1 issue)
- Rough Idle and Engine Hesitation2008-2013
Nearly 20% of C30 owners report rough idle issues according to Consumer Reports data. The rough idle can be caused by several factors: failing ignition coils, ETM (Electronic Throttle Module) issues, PCV system failures, and vacuum leaks. The 2.5L turbo I5 is particularly sensitive to PCV system degradation which causes positive crankcase pressure and oil ingestion into the intake. The 2.0L I4 models are less affected but can develop similar idle issues from ignition coil failures.
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What does P0301 mean on Volvo?▼
P0301 stands for "Cylinder 1 Misfire Detected." P0301 means the engine computer detected a misfire specifically in cylinder 1 — the spark didn't ignite the fuel properly, or the fuel/air mix didn't burn as it should. The computer detects this by sensing tiny variations in crankshaft speed each time a cylinder fires. A misfire wastes fuel, raises emissions, and can damage the catalytic converter if it's severe or persistent (a flashing check engine light usually warns of active, converter-damaging misfires). Because the code points to one specific cylinder, the cause is usually an ignition, fuel, or compression problem isolated to that cylinder. On Volvo specifically, this code is documented across 1 model.
What causes P0301 on Volvo vehicles?▼
Common causes on Volvo: Worn or fouled spark plug in cylinder 1, Failed ignition coil or coil pack for cylinder 1, Faulty or clogged fuel injector for cylinder 1, Vacuum or intake air leak affecting that cylinder, Bad spark plug wire (on applicable engines). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0301 on a Volvo?▼
Repair costs on Volvo range from $100 to $500, depending on the specific model and root cause.
Which Volvo models have P0301 documented?▼
Au7o has documented P0301 on 1 Volvo model: C30.