How Much Does a Check Engine Light Diagnosis Cost in Austin?
By the Auto Repair Home service team· Reviewed by an ASE-certified technician· Updated October 2026· 2 min read
The short answer
A professional check engine light diagnosis in Austin typically costs $90–$180. At Auto Repair Home it's $99, and that fee is credited toward the repair if you have us fix it.
Free scan vs. paid diagnosis
Parts stores read the trouble code for free, but the code only tells you which system flagged a fault. A paid diagnosis includes testing to prove which part failed.
What's included
Full module scan, freeze-frame data review, live data, and pinpoint tests such as smoke testing, fuel trim analysis or voltage checks.
Most common codes we see in Austin
P0420 (catalyst efficiency), P0300–P0306 (misfires), P0455/P0456 (EVAP leaks), P0171 (system lean) and P0128 (thermostat).
