Dashboard light guide · Glass Box Diagnostics
Not an emergency — but a safety net may be switched off, or a fault is logged and growing. Book before it turns into a red light.
Steady amber means a module logged a fault and you have time. Flashing means engine damage is happening right now and you do not. The light cannot tell you which part failed — over 100 generic codes can trigger it, and the honest answer starts with pulling the code and proving it, not buying the part its name mentions.
Read the code with a $30 reader, quote the part the code NAME references, skip the confirming test. The code clears, the light returns in 200 miles, and you paid twice.
Typical guess-and-swap cost: $200–$2,500 depending on which part the code name points at
All-module scan, freeze-frame data, live trims and misfire counters, then the specific test that proves the fault — component action test, smoke test, pressure test. 20 to 90 minutes, flat rate.
Codes this light commonly sets
Symptoms that come with this light
We come to you — Canyon Lake, San Antonio & Austin. Written report with root cause — see a sample.