P0300 Nissan Pathfinder
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 Nissan Pathfinder 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 Nissan Pathfinder.
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 Nissan Pathfinder.
Common Causes on Nissan Pathfinder
- Ignition coil failure on 2.5L QR25DE (Rogue) or 3.5L VQ35DE (Pathfinder/Murano)
- Spark plug fouling from oil consumption on high-mileage QR25DE in Rogue
- Carbon buildup on intake valves from direct injection on KR15DDT 1.5L turbo (2021+ Rogue)
- Fuel injector tip deposit buildup on VQ35DE causing uneven fuel delivery
- Timing chain stretch causing cam timing errors on QR25DE above 120k miles
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 Nissan Pathfinder
The 2021+ Rogue 1.5L VC-Turbo has variable compression which can complicate misfire diagnosis.