P0300 Chevrolet Trax
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 Chevrolet Trax 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 Chevrolet Trax.
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 Chevrolet Trax.
Common Causes on Chevrolet Trax
- Ignition coil failure on 1.2L or 1.3L turbo three-cylinder engine (Trax/Encore GX)
- Spark plug gap erosion from extended service interval on small displacement turbo
- Turbo wastegate actuator sticking causing boost-related combustion issues
- Carbon buildup on intake valves from direct injection system
- Fuel injector tip deposit buildup causing poor spray pattern
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 Chevrolet Trax
Three-cylinder engines amplify misfire symptoms more noticeably than four or six-cylinder engines.