Engine Diagnostics
Advanced computer diagnostics for check engine lights & performance issues
From $95Expert Engine Diagnostics in Douglasville, GA
When your check engine light comes on, you need answers — not guesswork. At RW General Automotive & Tires, our ASE-certified technicians use professional-grade diagnostic equipment to read trouble codes, identify the root cause, and get you back on the road with confidence.
Our Diagnostic Services
- Check Engine Light Diagnosis — Read and interpret diagnostic trouble codes (DTCs)
- Computer System Scan — Full OBD-II scan covering all vehicle modules
- Performance Diagnostics — Identify causes of rough idle, misfires, or poor acceleration
- Emissions Diagnostics — Troubleshoot emissions system failures for Georgia inspection
- Electrical System Testing — Pinpoint shorts, drain, and faulty sensors
- Drivability Analysis — Diagnose hesitation, stalling, or unusual engine behavior
Don’t Ignore Warning Lights
Your vehicle’s onboard computer monitors dozens of systems in real time. When something falls outside normal parameters, it triggers a warning light. Ignoring it can turn a simple repair into an expensive one. A $95 diagnostic today could save you thousands in engine damage down the road.
Beyond the Code Reader
Many shops plug in a basic code reader and charge you for a “diagnostic.” At RW, we go deeper. Our technicians interpret the codes in context, perform live data analysis, and test individual components to confirm the actual cause — not just the symptom. This means fewer unnecessary part replacements and a faster, more accurate repair.
Honest Diagnosis, Fair Pricing
We charge a flat diagnostic fee starting at $95, which is applied toward the cost of repair if you choose to have the work done at our shop. No hidden fees, no pressure — just honest answers about what your vehicle needs.
Frequently Asked Questions
What does the check engine light mean?
The check engine light can indicate anything from a loose gas cap to a serious engine issue. It means your vehicle's computer has detected a problem and stored a diagnostic trouble code. We use professional scanners to read these codes and pinpoint the exact issue.
How long does a diagnostic take?
A basic diagnostic scan takes about 30 minutes. More complex issues involving multiple systems may take 1-2 hours of testing. We'll give you an accurate time estimate when you bring your vehicle in.
What are the most common check engine light causes?
The most common causes include a faulty oxygen sensor, loose or damaged gas cap, catalytic converter issues, mass airflow sensor failure, and worn spark plugs or ignition coils.
Need a Repair? We're Here to Help.
Schedule your appointment today or give us a call.