P0300 Dodge Hornet
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 Dodge Hornet 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 Dodge Hornet.
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 Dodge Hornet.
Common Causes on Dodge Hornet
- Ignition coil failure on 2.0L GME turbo four-cylinder shared with Alfa Romeo Tonale
- Spark plug fouling from GDI carbon buildup on 2.0L Hurricane turbo intake valves
- MultiAir actuator failure causing erratic valve lift and combustion irregularities
- Turbo wastegate sticking causing overboosting or underboosting and misfire
- Low fuel pressure from high-pressure fuel pump failure on 2.0L turbo
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 Dodge Hornet
The Hornet shares its powertrain with Alfa Romeo; some parts may be sourced from Alfa dealers.