P0301 on Peugeot
Cylinder 1 Misfire Detected
P0301 on Peugeot vehicles indicates cylinder 1 misfire detected. Au7o has documented this code across 2 Peugeot models — most commonly on 206, 308. 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 Peugeot range from $80 to $900, 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 Peugeot by Model
Peugeot 206(1 issue)
- Ignition Coil Pack Failure (Petrol TU Engines)1998-2012
The wasted-spark coil pack on the 206's small petrol engines (1.1 KFV, 1.4 KFW and related TU units) is a frequent failure item: one of the two internal coils breaks down, dropping spark on a paired set of cylinders (1/4 or 2/3). Owners report intermittent misfire, rough running, the engine cutting out and refusing to restart until it cools, and the management light flickering. Forum consensus also warns that cheap aftermarket replacement packs often fail repeatedly or seat poorly, causing the fault to return.
Peugeot 308(1 issue)
- 1.6 THP Intake Valve Carbon Buildup (Direct Injection)2008-2017
Because the turbocharged 1.6 THP (EP6DT/EP6CDT/EP6DTS) injects fuel directly into the cylinder, no fuel washes over the backs of the intake valves; oil vapour from the PCV system bakes onto the valves and ports as hard carbon. Deposits typically become symptomatic between 50,000 and 80,000 km, progressively restricting airflow and causing rough cold idle, cold-start misfires, poor throttle response and higher fuel consumption.
Looking for P0301 on a different make?
View P0301 across all makes →Frequently Asked Questions
What does P0301 mean on Peugeot?▼
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 Peugeot specifically, this code is documented across 2 models.
What causes P0301 on Peugeot vehicles?▼
Common causes on Peugeot: 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 Peugeot?▼
Repair costs on Peugeot range from $80 to $900, depending on the specific model and root cause.
Which Peugeot models have P0301 documented?▼
Au7o has documented P0301 on 2 Peugeot models: 206, 308.