The 2022 Genesis G70 delivers sports sedan performance, so when a check engine light and vibration appear together with P0302, the refined driving experience is compromised. This specific code points to cylinder 2, giving a clear diagnostic target.
Understanding P0302
Code P0302 indicates cylinder 2 is misfiring—combustion isn't occurring properly in that specific cylinder. Whether your G70 has the 2.0T four-cylinder or 3.3T twin-turbo V6, a misfiring cylinder creates noticeable vibration.
Symptoms of Cylinder 2 Misfire
- Noticeable vibration at idle
- Check engine light on (steady or flashing)
- Reduced power during acceleration
- Rough running that may improve at higher RPM
- Possible fuel smell
Primary Causes
Ignition Coil Failure
Each cylinder has a dedicated coil. Cylinder 2's coil may have failed while others remain functional.
Spark Plug Issues
Worn electrodes, improper gap, or damage to cylinder 2's plug causes isolated misfires.
Fuel Injector Problems
Direct injection means cylinder 2's injector can develop issues independently.
Compression Loss
Less common on a 2022, but valve or ring issues affecting only cylinder 2 can cause misfires.
The Coil Swap Test
Move cylinder 2's coil to another cylinder. Clear codes and drive. If the misfire moves with the coil, it's confirmed bad. Simple and effective.
Repair Costs
| Repair | Parts | Labor | Total |
|---|---|---|---|
| Ignition coil (single) | $50-$120 | $100-$175 | $150-$295 |
| Spark plug (single) | $15-$35 | $100-$175 | $115-$210 |
| Fuel injector (single) | $150-$300 | $200-$350 | $350-$650 |
Warranty Coverage
Your 2022 G70 is covered by Genesis's 5-year/60,000-mile warranty and 10-year/100,000-mile powertrain warranty.