SparkFun
OBD-II connector
A bare OBD-II connector for building custom automotive diagnostic tools and vehicle data interfaces. OBD-II (On-Board Diagnostics II) is a standardised diagn...
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A bare OBD-II connector for building custom automotive diagnostic tools and vehicle data interfaces. OBD-II (On-Board Diagnostics II) is a standardised diagnostic port found on most cars, providing access to engine control unit (ECU) data for troubleshooting, monitoring, and data logging.
This connector is compatible with most vehicles that use the OBD-II standard. The 16-pin connector is typically located under the dashboard on the driver's side. Wire it to your microcontroller or SBC to build a custom diagnostic reader or vehicle data logger.
Key Features
- Standard OBD-II Connector – 16-pin, compatible with most OBD-II equipped vehicles
- Bare Connector – Unassembled, for custom wiring and integration
- Universal Compatibility – Fits the standard OBD-II port found in most cars
Specifications
- Standard – OBD-II
- Pins – 16
- Type – Bare connector (no cable or breakout board)
Ideal For
- DIY automotive diagnostic readers
- Vehicle data logging and telemetry projects
- CAN bus and ECU communication experiments
- Custom OBD-II breakout boards
Package Contents
- 1× OBD-II connector
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- CAN bus
- CAN bus is a reliable two-wire communication network originally designed for vehicles and now common in machinery and robotics. It matters when you need multiple controllers or devices to share status and control messages in a noisy electrical environment.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
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