# ClearTheCode ClearTheCode (clearthecode.com) is the largest open library of vehicle-specific OBD-II diagnostic guides, repair cost ranges, and step-by-step workflows for US cars and light trucks. Content is organized by diagnostic trouble code (DTC), repair hub, make/model/year, and symptom—not OEM service manuals. ## Primary entry points - [Home — AI diagnostic & repair cost calculator](https://clearthecode.com/) - [Diagnose a problem](https://clearthecode.com/diagnose) - [All OBD-II codes](https://clearthecode.com/codes) - [Published articles](https://clearthecode.com/articles) - [SEO spokes (code + vehicle)](https://clearthecode.com/spokes) ## Category hubs (powertrain, network, emissions) - [Fuel trim & air metering](https://clearthecode.com/hubs/fuel-trim-air-metering) - [Misfire & ignition](https://clearthecode.com/hubs/misfire-ignition) - [Catalyst & emissions efficiency](https://clearthecode.com/hubs/catalyst-emissions) - [EVAP & fuel vapor systems](https://clearthecode.com/hubs/evap-fuel-vapor) - [Cooling & thermostat](https://clearthecode.com/hubs/cooling-thermostat) - [Charging, PCM, & network diagnostics](https://clearthecode.com/hubs/charging-network) - [Idle speed & electronic throttle](https://clearthecode.com/hubs/idle-throttle) - [ABS, stability, & chassis electronics](https://clearthecode.com/hubs/abs-chassis) ## Machine-readable articles Append `.md` to any article URL for raw Markdown, for example: - https://clearthecode.com/articles/example-slug.md HTML pages include `rel="alternate" type="text/markdown"` pointing to the same `.md` URL. ## Optional - [Sitemap](https://clearthecode.com/sitemap.xml) - [FAQ](https://clearthecode.com/faq)