P0300 Honda Pilot
Random/Multiple Cylinder Misfire Detected · Powertrain Code · High · Repair: Easy
What is P0300?
The ECM has detected misfires occurring in multiple or random cylinders. Common causes include worn spark plugs, faulty ignition coils, vacuum leaks, low fuel pressure, or a failing catalytic converter.
When the Honda Pilot triggers code P0300 (random/multiple cylinder misfire detected), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Honda Pilot.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Honda Pilot.
Common Causes on Honda Pilot
- Ignition coil failure on 1.5L turbo (CR-V/HR-V) or 3.5L V6 (Pilot)
- Fuel dilution of engine oil on 1.5L turbo CR-V causing plug fouling (2017-2020 TSB)
- Carbon buildup on intake valves from direct injection on 1.5L turbo
- Spark plug gap erosion on 3.5L V6 beyond 105k-mile service interval
- Intake manifold runner control valve failure on 3.5L i-VTEC V6 Pilot
Symptoms
- Rough idle with noticeable engine vibration
- Engine shaking or stumbling under load
- Loss of power during acceleration
- Check engine light flashing intermittently
- Poor fuel economy
- Hesitation or stumble on acceleration
Notes for Honda Pilot
Honda issued ECU calibration updates to reduce fuel dilution on 2017-2020 CR-V 1.5T models.