P0302

What P0302 means

Cylinder #2 specifically is missing combustion events. Diagnose by swapping its ignition coil with a known-good one — if the misfire follows the coil, you've found the culprit.

Symptoms

• CEL (often flashing)
• Rough idle
• Loss of power

Likely causes (most common first)

1. Failed coil on cyl 2
2. Fouled spark plug
3. Clogged injector
4. Low compression

Can I keep driving?

High — risk of damage if ignored

Typical repair cost

DIY fixes can start near $40 (parts only). Shop repairs for P0302 typically run up to $800 depending on the underlying cause and vehicle. Start with the most common cause — Failed coil on cyl 2 — before throwing parts at it.

Symptoms that match P0302

If you got here from a search query, one of these might describe what your car is actually doing:

• Check Engine Light Flashing — What It Means and What to Do
• Engine Misfire — Symptoms, Codes, and What to Fix First
• White Smoke from Exhaust — What It Means
• Rough Running on Cold Start — Causes and Fixes
• Car Shakes at Idle — Engine, Mount, or Misfire?

Recommended parts & tools for P0302

Compare the parts and tools that pair with AXLY:

As an Amazon Associate, AXLY earns from qualifying purchases.

Related codes

Confirm P0302 yourself in 60 seconds

Two cheap things and you can read P0302 yourself — plus every other stored code and live engine data, free. No subscription.