P0300 Ford Explorer
Random/Multiple Cylinder Misfire Detected · Powertrain Code · High · Repair: Moderate
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 Ford Explorer 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 Ford Explorer.
This repair is rated moderate, meaning some experience and specialty tools required.
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 Ford Explorer.
Common Causes on Ford Explorer
- Ignition coil failure on 2.3L EcoBoost or 3.3L V6 in Explorer
- Cam phaser failure causing timing-related misfires on 3.5L EcoBoost in Explorer (2016-2019)
- Carbon buildup on direct injection intake valves on 2.0L and 2.3L EcoBoost Edge/Explorer
- Vacuum leak at turbo charge pipe connections causing lean misfire
- Fuel pump driver module failure causing inconsistent fuel pressure (2011-2017 Explorer)
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 Ford Explorer
The 2016-2019 Explorer 3.5L EcoBoost shares the cam phaser issue with the F-150 platform.