P0302 Cylinder 2 Misfire Explained – Why Your Engine Runs Rough

P0302 indicates combustion failure in Cylinder 2.

This causes engine imbalance because one cylinder produces less power.

Symptoms Drivers Notice

• Rough idle

• Engine vibration

• Slow acceleration

• Possible fuel smell

• Reduced MPG

Top Causes

• Failed ignition coil

• Worn spark plug

• Fuel injector clog

• Low compression

• Wiring issue

Quick Diagnosis Trick

Mechanics often:

1. Swap coil between cylinders

2. Clear codes

3. Re-scan

If code changes → bad coil.

Can You Keep Driving?

Short trips only.
Misfires may damage catalytic converter.

Typical Repair Cost