📖 What Does P0300 Mean?
The engine control module has detected misfires occurring randomly across multiple cylinders. This indicates combustion is not happening properly in one or more cylinders, causing rough engine operation and potential damage.
Symptoms
Flashing check engine light, rough idle, engine shaking or vibrating, loss of power during acceleration, poor fuel economy, strong exhaust odor, engine hesitation or stumbling.
Common Causes
Worn or fouled spark plugs, faulty ignition coils, clogged fuel injectors, low fuel pressure, vacuum leaks, low compression, carbon buildup on valves, faulty fuel pump, dirty air filter.
Possible Solutions
Replace spark plugs and ignition coils, clean or replace fuel injectors, check fuel pressure and replace fuel pump if needed, repair vacuum leaks, perform compression test, clean carbon deposits.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0300
How serious is P0300?
This code has a high severity level. You should address this issue immediately to prevent engine damage.
Can I drive with P0300?
Driving with this code is not recommended as it may cause further engine damage.
How much does it cost to fix P0300?
Repair costs vary depending on the root cause, but typically range from $200-500 including parts and labor.
Related Diagnostic Codes
Other codes that may appear with P0300
Cylinder 1 Misfire Detected
Cylinder 2 Misfire Detected
Cylinder 3 Misfire Detected
Cylinder 4 Misfire Detected
Cylinder 5 Misfire Detected
Cylinder 6 Misfire Detected
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system