What EngineIQ does
EngineIQ takes symptoms, trouble codes, freeze-frame data and your own description of the problem, and returns probable faults ranked by likelihood with a guided diagnostic path. It is a diagnostic aid, not a replacement for a qualified technician.
How these guides are made
Each guide starts from a real search query. Drafts are produced with AI assistance, then edited and approved by a person before publishing — nothing here publishes automatically.
Trouble-code definitions follow the standardized SAE J2012 / ISO 15031-6 descriptions. Manufacturer-specific codes are deliberately excluded, because the same code can mean different things across makes and a generic answer would be wrong more often than right. Other claims are sourced from the references cited at the bottom of each article.
Repair work carries real risk. These guides describe likely causes and diagnostic order; they are not step-by-step repair instructions, and anything involving fuel, high-voltage or airbag systems belongs with a professional.
Corrections
If something here is wrong, it gets fixed. Published articles are edited and republished when an error surfaces — the update date on each article reflects the last real change to it.
Who writes these
Andrew Thompson, Founder — Andrew Thompson builds EngineIQ. He writes and reviews the trouble-code guides published here, working from the SAE J2012 / ISO 15031-6 standard definitions and the sources cited on each article.