Engine Diagnostics & Check Engine Light Service
Vehicle Diagnostics — Cheyenne, WY
A check engine light can mean anything from a loose gas cap to a failing sensor to a mechanical problem inside the engine. The code stored in your vehicle's computer is a starting point — not an answer. TDC Automotive follows the correct diagnostic procedure every time: verify the issue, visually and physically inspect the vehicle, scan for diagnostic trouble codes, and then test to confirm the suspect component is actually failing before it gets replaced.
That discipline is what separates a real diagnosis from an expensive guess. Whether your engine is running rough, losing power, stalling, using oil, or just lit up the dash, Trevor will tell you exactly what he found, what it needs, and what it will cost — before the work starts.
What's Included
- Check engine light diagnosis (gas and diesel)
- Rough running, stalling and power-loss complaints
- Full DTC scan and live-data testing
- Component testing to confirm the actual failure
- Straight answers and an estimate before repair
How Trevor Diagnoses a Problem
- Verify the complaint
Before touching a wrench, Trevor reproduces the symptom you're describing — sometimes on a test drive with you in the passenger seat so you can point out exactly what you're feeling or hearing.
- Inspect the vehicle
A visual and hands-on physical inspection often reveals what a scan tool can't: chafed wiring, soot trails, wet gaskets, loose components.
- Scan for trouble codes
Diagnostic trouble codes (DTCs) narrow the search to the right system and circuit.
- Test to confirm
The suspect component gets tested and confirmed as failed before it's replaced. Then the repair is verified with a final test drive.
Related Diagnostics Services
Frequently Asked Questions
How much does engine diagnostics cost at TDC Automotive?
Labor is billed hourly at $125/hr for gas vehicles and $135/hr for diesel, and you'll get findings and an estimate before repair work begins. Call (307) 996-0980 with your year, make and model and Trevor can give you a realistic idea of what's involved.
Do I need an appointment for engine diagnostics?
Call ahead at (307) 996-0980 — as an owner-operated shop, TDC schedules work so your vehicle gets Trevor's full attention rather than sitting in a lot for a week.
Where is the shop, and what area do you serve?
The shop is at 8407 Aztec Drive in Cheyenne, Wyoming, and serves all of southeast Wyoming plus the Nebraska panhandle and Northern Colorado — customers regularly drive in from Laramie, Wheatland, Torrington, Pine Bluffs, Wellington, Fort Collins and Greeley.