Ignition · Severity: High
P0300 — Random/Multiple Cylinder Misfire Detected
The ECU detects misfires on more than one cylinder or randomly across cylinders.
Common symptoms
- Shaking at idle
- Flashing engine light
- Loss of power
- Raw fuel smell
Likely causes
- Worn spark plugs or coils
- Vacuum leak
- Low fuel pressure
- Low compression
- Contaminated fuel
First test to run
Check misfire counters per cylinder in live data; if spread evenly, look at common causes (fuel pressure, vacuum leak) before ignition parts.
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