P0301 Chevrolet Malibu
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 Chevrolet Malibu 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 Chevrolet Malibu.
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 Malibu.
Common Causes on Chevrolet Malibu
- Ignition coil failure on cylinder 1 on 1.5T or 2.0T turbo engine
- Spark plug fouled or worn beyond service life
- Fuel injector clogged on GDI system causing lean misfire
- Vacuum leak at cylinder 1 intake runner or PCV hose
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 Chevrolet Malibu
Malibu turbo engines can foul spark plugs more quickly than NA engines; check plug condition.