Do all check engine codes indicate serious problems?

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No. Some codes are caused by minor issues like a loose gas cap or a failing oxygen sensor. But some indicate more serious faults. Proper diagnostics help distinguish between them.
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What Our Check Engine Light Diagnostics Include:

✓ OBD-II Computer Scans to Pinpoint Engine Issues
✓ Sensor & Emission System Inspections for Accurate Troubleshooting
✓ Fuel & Ignition System Testing to Restore Performance
✓ Detailed Explanations of Trouble Codes & Repair Recommendations
✓ Fast & Affordable Service to Get You Back on the Road