HIGH — Repair SoonOBD CODE: P0300

Check Engine Warning Light

Engine or emissions fault detected by ECU.

🔍 Common Causes

O2 sensor fault

Loose gas cap

Spark plug issue

Catalytic converter

✅ What To Do

Scan with OBD2 scanner and repair fault immediately.

💡 Use an OBD2 scanner to read the exact fault code and confirm the root cause before replacing parts.

Full Diagnostic Guide

See every fault code, sensor test, and repair step for P0300