P0303
Cylinder 3 Misfire Detected
P0303 is an OBD-II diagnostic trouble code meaning: Cylinder 3 Misfire Detected. Common causes: spark plug fault, problems with the ignition coil. Estimated repair cost: $56–167.
Symptoms
- Engine troubles
- Power Loss
- Increased fuel consumption
- Vibrations at idle
- Check Engine Light Is On
Causes
- Spark plug fault
- Problems with the ignition coil
- Dirty or faulty fuel injectors
- Low cylinder compression
- Problems with the ignition system
- Vacuum leak
- Malfunction of the mass air flow sensor (MAF)
How to Fix
- Check spark plugs and replace if necessary
- Check the ignition coil on cylinder 3
- Check fuel injectors
- Measure the compression in the cylinder
- Check the intake manifold for leaks
- Check the operation of the mass air flow sensor
Related codes
Error P0303 by Vehicle Brand
FAQ
What does the P0303 code mean?
P0303 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Misfire Detected
What causes a P0303 error code?
The most common causes of P0303 include: Spark plug fault; Problems with the ignition coil; Dirty or faulty fuel injectors; Low cylinder compression.
How do I fix a P0303 diagnostic trouble code?
To fix P0303: Check spark plugs and replace if necessary. Check the ignition coil on cylinder 3. Check fuel injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0303?
Limited driving only, diagnose soon
How much does it cost to fix P0303?
The estimated repair cost for P0303 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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