How we verify our content
Code-lookup sites have a bad reputation, and it's earned: meanings guessed from a code's letters, spec tables copied until nobody remembers the source, part numbers that don't exist. We built this site on the opposite rule.
The rule
Nothing is published as fact unless we could confirm it against authoritative documentation — manufacturer service information, official support pages, OEM technical documents, or government sources such as NHTSA. When we can't confirm a claim, we hedge it explicitly on the page or remove it. We do not guess what a manufacturer-specific code means from its number, and we do not copy from other lookup sites.
What counts as a source
Authoritative: vehicle and engine manufacturer service documentation, OEM support pages, official alarm/fault-code lists, and NHTSA recall and complaint data. Where a code page lists sources, those links go to the documents we actually checked.
Not verification sources: other code-lookup sites, forums, YouTube summaries, or AI-generated answers — including our own drafts. Every meaning on this site started as a claim to be checked, not a fact to be published.
Corrections — including our own
Through 2026 we have run adversarial audits over our own catalog: fault-code meanings, torque and fluid spec tables, part recommendations, and repair guides, checked against manufacturer documentation. Where we found errors — and we found real ones, including safety-relevant ones — we corrected or deleted them and published the fixes within days. Fabricated identifiers we've caught (nonexistent part numbers, tools, and TSBs) go onto an automated blocklist that fails our build if any of them ever reappears, so a proven fabrication can't quietly return.
We'd rather have fewer pages than wrong ones. A wrong meaning wastes your money on parts you don't need — or worse, tells you a serious fault is safe to drive on.
Honest recommendations
Product links are affiliate links (Amazon Associates and other programs), and they're held to the same standard as the content: reputable brands, honest trade-offs, and no recommendation we wouldn't stand behind. Fitment parts link to searches rather than a single listing, because one part number can't honestly fit every vehicle. We don't display prices we can't keep current.
Found an error?
Tell us and we'll check it against the documentation — and fix it if you're right: [email protected]. Corrections ship in days, not quarters.