P0301 Jeep Cherokee
Cylinder 1 Misfire Detected · Powertrain Code · High · Repair: Easy
What is P0301?
Misfire detected in cylinder 1. Typically caused by a worn spark plug, bad ignition coil, faulty fuel injector, or low compression in that cylinder.
When the Jeep Cherokee triggers code P0301 (cylinder 1 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 Jeep Cherokee.
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 Jeep Cherokee.
Common Causes on Jeep Cherokee
- Ignition coil failure on cylinder 1 on 3.6L Pentastar V6
- Spark plug worn or fouled from oil leak at valve cover gasket
- Fuel injector clogged on GDI system
- Intake valve carbon buildup on 3.6L Pentastar GDI engine
Symptoms
- Rough idle with noticeable engine vibration
- Engine shaking or vibration especially at idle
- Loss of power during acceleration
- Check engine light flashing (indicating catalytic converter damage risk)
- Poor fuel economy from unburned fuel
- Unburned fuel smell from exhaust
Notes for Jeep Cherokee
Grand Cherokee Pentastar 3.6L cylinder 1 coil is on the front bank; easy access from top.