DTC code
P0302
Cylinder 2 Misfire Detected
Technical guide
Symptoms
- Cylinder 2 misfire
- rough idle
- shaking
- check engine light
Probable causes
- Cylinder 2 misfire
- ignition coil
- spark plug
- injector
- compression
Diagnostic steps
1) Swap coil from cyl 2 to another. 2) Replace spark plug cyl 2. 3) Test injector. 4) Compression test.
Brand-specific notes (Hyundai/Kia)
Hyundai/Kia · all petrol models · all petrol engines
Symptoms
- Rough idle
- loss of power
- check engine light (may flash)
- shaking
- fuel consumption increase
Probable causes
- Worn spark plug on cylinder 2
- failed ignition coil
- bad fuel injector
- low compression on cylinder 2
- intake air leak near cylinder 2
Diagnostic steps
1) Replace spark plug on cylinder 2. 2) Swap ignition coil from cylinder 2 to another - if fault moves to other cylinder, replace coil. 3) Test injector resistance. 4) Compression test - all cylinders should be within 10%. 5) Check intake manifold gasket for leak near cylinder 2.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0302
Nothing confirmed yet for this code. No guess is offered on purpose.
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