What P0301 means
Diagnostic Trouble Code (DTC) P0301 stands for Cylinder 1 Misfire Detected. This is a generic OBD2 diagnostic trouble code indicating that the engine computer (ECU) has registered an operational anomaly in the powertrain (p) systems.
When this error registers, the ECU records a freeze frame of sensor data and lights up the Check Engine Light on your dashboard to notify the operator of a system fault.
Symptoms of OBD2 Code P0301
When code P0301 is active, your car might exhibit the following common symptoms:
- Engine hesitation
- Rough idling
- Vibrating dashboard and engine compartment
- Flashing Check Engine Light
Common Causes of Code P0301
Faults that trigger this code typically include:
- Cause 1: Faulty spark plug or coil on Cylinder 1
- Cause 2: Bad fuel injector on Cylinder 1
- Cause 3: Loss of engine compression on Cylinder 1 (valves/rings)
Can you drive with a P0301 code?
No, running with a dead cylinder causes engine vibration and can destroy the catalyst.
Expected Repair Cost Band
$60 - $200 for a spark plug and ignition coil.
Related Diagnostic Trouble Codes
If you have scanned multiple codes, see these related guides for troubleshooting context:
Frequently Asked Questions
No, it is highly recommended to tow or park the vehicle to prevent costly catalytic converter damage.