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L
p0300
Moderate
Lexus · SUVs
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Lexus SUVs means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
GX550LX600NX250NX350NX350hNX450hplusRX350RX350hRX500hRZ450eTX350TX500hUX250h
Likely Causes
  1. Worn spark plugs
  2. Faulty ignition coils
  3. Fuel injection problems
  4. Low fuel pressure
  5. Engine compression issues
How to Fix It
1
Connect OBD-II scanner to identify specific cylinder
2
Inspect and replace spark plugs
3
Check ignition coil resistance with multimeter
4
Test fuel pressure and injector pulse
5
Perform compression test on cylinders
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes
P0171P0174P0420P0430P0441
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