What does code P0301 mean and is it safe to drive?
P0301: Cylinder 1 Misfire Detected. Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.
Powertrain
What this code means
The PCM has detected a misfire specifically on cylinder 1. Similar to P0300, but pinned to a single cylinder.
Common causes
- Worn or fouled spark plug on cylinder 1
- Failing ignition coil or coil-on-plug
- Leaking or clogged fuel injector
- Low compression in cylinder 1
Symptoms
- Check Engine Light (often flashing when misfire is severe)
- Rough idle or shaking, especially at low RPM
- Loss of power under load
Typical fixes
- Replace spark plug and/or coil on cylinder 1
- Test and clean or replace the injector
- Perform compression test and repair internal issues if needed
Repair cost range
Repairs for P0301 often fall between $150 and $900, depending on the cause and your vehicle.