A free fault-code lookup box for your website

Run a workshop, a car club, a parts shop or a motoring blog? Give your visitors a quick way to look up a check-engine code. They type the code, and a plain-English explanation opens in a new tab: what it means, how urgent it is and what to check first.

Preview

Copy this into your page

<form action="https://kustomcode.xyz/diagnostics/lookup" method="get" target="_blank" style="max-width:420px;font-family:system-ui,sans-serif;border:1px solid #cbd5e1;border-radius:12px;padding:12px;background:#fff">
  <label for="kc-code" style="display:block;font-weight:700;font-size:14px;margin-bottom:6px;color:#0f172a">What does my check-engine code mean?</label>
  <div style="display:flex;gap:6px">
    <input id="kc-code" name="code" placeholder="e.g. P0420" maxlength="6" required style="flex:1;padding:8px 10px;border:1px solid #94a3b8;border-radius:8px;font-family:monospace;text-transform:uppercase">
    <button type="submit" style="padding:8px 14px;border:0;border-radius:8px;background:#10b981;color:#022c22;font-weight:700;cursor:pointer">Look up</button>
  </div>
  <p style="margin:6px 0 0;font-size:11px;color:#64748b">Free fault code library by <a href="https://kustomcode.xyz/diagnostics/codes" style="color:#047857">KustomDiagnostics</a></p>
</form>

Plain HTML: no JavaScript, no cookies, no tracking, nothing to install.
Works in WordPress (Custom HTML block), Wix (Embed HTML), Squarespace (Code block) and any site that accepts HTML.
Change the colours or text to match your site. Please keep the KustomDiagnostics link.
Free for any website. The explanations are general guidance, not a diagnosis.

Questions? Contact us. Or try the free browser scan tool.