P0301
Cylinder 1 Misfire Detected
P0301 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Misfire Detected. Common causes: faulty spark plug, problems with the ignition coil. Estimated repair cost: $56–167.
Symptoms
- The engine hesitates or runs unevenly
- Power reduction
- Increased fuel consumption
- Vibrations at idle
- Check Engine light comes on
Causes
- Faulty spark plug
- Problems with the ignition coil
- Dirty or faulty fuel injectors
- Low cylinder compression
- Problems with the mass air flow sensor (MAF)
- Knock sensor malfunction
- Vacuum leak
- Problems with the ignition system
How to Fix
- Check and replace spark plugs
- Check the ignition coil and high-voltage wires
- Clean or replace fuel injectors
- Check compression in cylinder
- Check the mass air flow sensor (MAF)
- Check knock sensor
- Check the intake manifold for vacuum leaks
- Check the ignition system
Related codes
Error P0301 by Vehicle Brand
FAQ
What does the P0301 code mean?
P0301 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Misfire Detected
What causes a P0301 error code?
The most common causes of P0301 include: Faulty spark plug; Problems with the ignition coil; Dirty or faulty fuel injectors; Low cylinder compression.
How do I fix a P0301 diagnostic trouble code?
To fix P0301: Check and replace spark plugs. Check the ignition coil and high-voltage wires. Clean or replace fuel injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0301?
Limited driving only, diagnose soon
How much does it cost to fix P0301?
The estimated repair cost for P0301 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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