P0300 Kia Telluride
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 Kia Telluride 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 Kia Telluride.
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 Kia Telluride.
Common Causes on Kia Telluride
- Ignition coil failure on 3.8L Lambda V6 (Palisade/Telluride)
- Spark plug electrode erosion on 3.8L V6 beyond 60k-mile service interval
- Fuel injector tip deposits from port injection buildup on 3.8L Lambda II
- Intake manifold runner flap sticking from carbon accumulation on 3.8L MPI engine
- CVVT solenoid screen clogging from oil sludge on engines with extended oil change intervals
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 Kia Telluride
The 3.8L Lambda II uses port injection which avoids GDI carbon buildup issues.