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.
PowertrainDrive with caution
Repair cost
$150–$900
System
Powertrain
Urgency
high
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.