p0300
Moderate
Toyota · SUVs
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Toyota SUVs means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
4Runner TRD Pro 2024Grand Highlander Limited 2024Highlander XLE 2024Highlander Hybrid Bronze Edition 2023Land Cruiser 1958 Edition 2024RAV4 XLE Premium 2024RAV4 Hybrid SE 2024Sequoia Capstone 20244Runner Limited 20244Runner SR5 20244Runner TRD Off-Road 2024Grand Highlander Platinum 2024Grand Highlander XLE 2024Highlander LE 2024Highlander Limited 2024Highlander Platinum 2024RAV4 Adventure 2024RAV4 LE 2024RAV4 TRD Off-Road 2024RAV4 XLE 2024Sequoia Limited 2024Sequoia Platinum 2024Sequoia SR5 2024Sequoia TRD Pro 2024Venza Limited 2024
Likely Causes
How to Fix It
1
Remove and inspect all spark plugs for wear, fouling, or incorrect gap
2
Test each ignition coil for proper output using a coil-on-plug tester
3
Check fuel system pressure and volume against Toyota specifications
4
Perform a smoke test for vacuum leaks in the intake system
5
Run a compression test on all cylinders to check for mechanical issues
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs (full set)
Ignition coils
Fuel filter
Intake manifold gasket
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