Engine
Diagnostics
A check engine light can mean anything from a loose gas cap to a failing catalytic converter. The difference between a $20 fix and a $2,000 repair comes down to accurate diagnosis. That's where most shops get it wrong — they read the code, replace the part the code points to, and hope for the best.
At Mint Hill Automotive, we use professional-grade diagnostic scanners and actually trace the problem. We read live data, check freeze frame information, test components individually, and confirm the root cause before recommending any repair. You pay for the diagnosis once, not for repeated guesses.
A code is not a diagnosis. Code P0420 doesn't always mean "replace the catalytic converter." We find out why the code set before recommending parts.
What's Included
- Full OBD-II scan — all modules, not just engine
- Freeze frame data analysis
- Live data monitoring and comparison to specs
- Component-level testing as needed
- Visual inspection of related systems
- Clear codes after repair and verify fix
- Written report of findings and recommendations
- Road test to confirm repair
Our Process
Full System Scan
We connect professional-grade diagnostic equipment and scan all vehicle modules — engine, transmission, ABS, airbag, body control. Not just the engine codes.
Data Analysis
We review freeze frame data to understand the conditions when the fault occurred, monitor live sensor data, and compare readings against manufacturer specifications.
Component Testing
Based on the data, we test suspect components individually — sensors, actuators, wiring, and connections. We confirm the failure before recommending replacement.
Report & Recommendation
You get a clear explanation of what we found, what it means, and what it will take to fix it. No pressure, no jargon, no unnecessary repairs.
Warning Signs
to Watch For
These symptoms indicate your vehicle needs professional diagnostics:
- Check engine light is on (solid or flashing)
- Vehicle running rough, misfiring, or stalling
- Reduced power or hesitation during acceleration
- Poor fuel economy that's gotten noticeably worse
- Failed emissions test or state inspection
- Strange smells — fuel, sulfur, or burning