P0302
P0302 Cylinder 2 Misfire
P0302 is a cylinder-specific misfire code. The computer sees cylinder 2 slowing down compared with the rest of the engine.
How urgent is P0302?
A misfire can damage the catalytic converter if driven hard or ignored.
Common symptoms
- Rough idle
- Engine shake
- Hesitation
- Check engine light
- Raw fuel smell
Likely causes
- Spark plug wear
- Ignition coil failure
- Injector fault
- Vacuum leak
- Low compression
What to check before replacing parts
1
Swap coil locations
2
Inspect plug condition
3
Check injector operation
4
Review freeze-frame data
5
Compression test if needed
Use the code with symptoms
A code points at the system, not always the failed part. Add your vehicle, mileage, symptoms, and whether the check engine light is steady or flashing so the AI diagnostic can narrow the next step.