P0301

Cylinder 1 Misfire Detected

Q: What does fault code P0301 mean?

Cylinder 1 Misfire Detected. The ECM has detected a misfire on cylinder 1, with the misfire rate exceeding the threshold.

Q: What are the possible causes of P0301?

Cylinder 1 spark plug failure; Cylinder 1 ignition coil failure; Cylinder 1 fuel injector failure; Cylinder 1 valve clearance abnormal; Cylinder 1 low compression pressure.

Severity: High Ignition System Generic Code

Detailed Description

The ECM has detected a misfire on cylinder 1, with the misfire rate exceeding the threshold.

Possible Causes

Cylinder 1 spark plug failure

Cylinder 1 ignition coil failure

Cylinder 1 fuel injector failure

Cylinder 1 valve clearance abnormal

Cylinder 1 low compression pressure.

Solutions & Repair Guide

Swap the cylinder 1 ignition coil with another cylinder and see if the fault code follows; Check the cylinder 1 spark plug; Measure cylinder 1 compression pressure; Check cylinder 1 fuel injector operation.

Disclaimer: The information above is for reference only and does not constitute professional repair advice. Actual causes may vary depending on vehicle make, model, year, and configuration. Always consult a qualified technician for accurate diagnosis.