Can I drive with P0300?

Flashing light? Stop driving now. Steady light? Drive gently to a mechanic soon. If the check engine light is steady, drive gently to a mechanic soon. If the check engine light is FLASHING, stop driving. Unburned fuel can destroy the catalytic converter.

What does P0300 mean?

P0300 stands for Random/Multiple Cylinder Misfire Detected.

Symptoms you may notice

• Engine shaking or stumbling under acceleration
• Noticeable power loss and sluggish response
• Flashing or steady check engine light
• Strong fuel odor from the exhaust pipe

How much does it cost to fix?

Repair costs for code P0300 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:

• Worn or fouled spark plugs and ignition coils
  $60-$300 common
• Intake vacuum leak leaning out combustion
  $30-$120 common
• Low fuel pressure or clogged fuel filter
  $80-$350 possible
• Low engine cylinder compression
  $500-$2000 rare

What to do next

1. Observe your check engine light: if it is FLASHING, stop driving now to avoid catalytic converter damage.
2. If the check engine light is STEADY, drive gently to a mechanic soon without hard acceleration or towing.
3. Inspect the spark plugs, ignition coils, and fuel injector connectors for faults.

Related codes

About this code

Code P0300 signifies that multiple cylinders are randomly misfiring or the computer cannot isolate the misfire to a single cylinder. Misfires allow unburned fuel into the exhaust, which ignites inside the catalytic converter and melts its ceramic honeycomb. If your check engine light is flashing, pull over and tow the car to prevent catastrophic catalytic converter and engine failure.