2014 Toyota P0303: What It Means & Is It Safe to Drive?
P0303 on the 2014 Toyota: Cylinder 3 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM has detected a misfire specifically on cylinder 3. Diagnosis follows the same steps as P0301—swap parts to the same position on a known-good cylinder to isolate the fault.
Common causes on the 2014 Toyota
- Worn or fouled spark plug on cylinder 3
- Failing ignition coil on cylinder 3
- Leaking or clogged fuel injector
- Low compression on cylinder 3
Symptoms
- Check Engine Light, often flashing under load
- Rough idle or shaking
- Loss of power, hesitation
Typical fixes
- Replace spark plug and coil on cylinder 3
- Test and replace fuel injector
- Compression test if ignition parts don't resolve it
Repair cost range
For a 2014 Toyota, repairs for P0303 typically fall between $150 and $900, depending on the root cause and labor rates in your area.
Known issues on Toyota
On Toyota's 2GR-FE V6, cylinder 3 is on the rear bank and harder to access. Rear-bank coil failures are more common due to heat exposure from the exhaust manifold. Confirm by swapping to a front-bank coil—if the misfire moves, replace the rear-bank coil before pulling the intake.
Most commonly affected models