DTC P0300 - Random/Multiple Cylinder Misfire Detected
P0300 indicates: Random/Multiple Cylinder Misfire Detected.
Diagnostic summary
P0300
What it means
Random/Multiple Cylinder Misfire Detected
Can you drive?
๐ Do not drive
Urgency
High 7/10
Typical price
$100 โ $800
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Updated May 7, 2026 Seen on Powertrain
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โน๏ธ What does it mean?
Random/Multiple Cylinder Misfire Detected
๐ Symptoms
- โข Check Engine Light on
- โข Reduced performance
- โข Increased fuel consumption
- โข Unusual behavior
โ ๏ธ Possible Causes
- โ Worn spark plugs
- โ Faulty ignition coils
- โ Vacuum leak
- โ Low fuel pressure
- โ Bad injector
๐ Can I drive with this code?
Do not drive
Not safe. Repair immediately.
๐ง How to Diagnose
- 1 Read DTCs with scanner
- 2 Check freeze frame
- 3 Inspect components
- 4 Clear and test
๐ ๏ธ How to Fix
- 1 Replace spark plugs
- 2 Check ignition coils
- 3 Fix vacuum leaks
- 4 Test fuel system
๐ฐ Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$35 โ $520
Mechanic / labor$45 โ $600
Repair range$100 โ $800
โ FAQ
What does P0300 mean?
Random/Multiple Cylinder Misfire Detected
How serious is P0300?
Severity: high. Not safe. Repair immediately.
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