P0302 on Renault: How to Diagnose & Fix
Cylinder 2 Misfire Detected
1 Renault model · 1 documented issue · $80-$250 repair
P0302 on Renault by model: symptoms, diagnosis and fix
The Clio II and III petrol engines suffer from premature ignition coil pack failure, causing misfires and rough running. The coil packs crack from heat cycling and moisture ingress, particularly on the 1.2 and 1.4 engines.
Common Symptoms
- Engine misfire
- Rough idle
- Hesitation under acceleration
- Check engine light flashing
How to Fix
Replace the faulty coil pack. It is recommended to replace all coil packs simultaneously and use OEM Sagem units. Inspect and replace spark plugs at the same time.
Sources for this issue (1)
P0302 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0302 mean on a Renault?
P0302 stands for "Cylinder 2 Misfire Detected." This code means the engine computer has detected a misfire specifically in cylinder 2, meaning that cylinder isn't completing combustion properly on some firing events. The computer watches tiny variations in crankshaft speed to spot when a cylinder fails to fire, and a misfire means the air-fuel mixture isn't igniting correctly — usually from a spark, fuel, or compression problem in that cylinder. You may feel a stumble, rough idle, shaking, loss of power, or a flashing check-engine light, and persistent misfires can damage the catalytic converter. Because it names a single cylinder, the fault is often a component serving just cylinder 2, like its coil, plug, or injector. On Renault it is documented across 1 model: Clio.
What are the most common causes of P0302?
The most common causes of P0302 are: Worn or fouled spark plug (cylinder 2), Failed ignition coil or coil-on-plug (cylinder 2), Clogged or faulty fuel injector (cylinder 2), Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt/bent valve, head gasket), Damaged spark plug wire or boot (if equipped), Carbon-tracked or cracked coil/plug causing spark loss, Faulty PCM/ECM driver (rare). The specific cause varies by vehicle.
How much does it cost to fix P0302 on a Renault?
Published repair estimates on Renault range from $80 to $250 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0302 on a different make?
View P0302 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.