Auto Diagnostics in Houston, TX

When a warning light comes on in your car, the only way to know what it actually means is a proper computerized diagnostic scan. At Liberty Auto Repair, we use professional-grade OBD-II scan tools that read every fault code across all vehicle systems — engine, transmission, ABS, airbag, TPMS, emissions, and more. We do not just read the code number and hand you a printout. We diagnose the root cause and explain it to you in plain language before recommending any repair.

The check engine light is the most common warning light we see. It can indicate something as minor as a loose gas cap or as serious as a misfiring cylinder that is damaging your catalytic converter. A steady check engine light is usually non-urgent. A flashing check engine light means pull over — active misfires can cause thousands of dollars in additional damage if you keep driving. We will tell you exactly which situation you are in.

Our diagnostic process covers the full vehicle, not just the powertrain. We check for active codes, pending codes (problems that have not yet triggered a warning light), and freeze-frame data — the snapshot of engine conditions at the moment the fault occurred. This gives us a complete picture of your vehicle's health and helps us find problems before they become expensive.

Beyond the check engine light, we diagnose ABS warning lights, traction control lights, airbag and SRS lights, TPMS (tire pressure) lights, battery and charging system warnings, and transmission fault indicators. Most drivers do not realize these systems can all be scanned with the same diagnostic tools.

We service all makes and models — Honda, Toyota, Ford, Chevrolet, Dodge, Jeep, BMW, Mercedes-Benz, Audi, Volkswagen, Hyundai, Kia, Nissan, and more. Our technicians have 20+ years of hands-on diagnostic experience across domestic, import, and European vehicles. We have seen every code, every symptom, and every make. If your car has a problem, we will find it.