OBDII is an on board diagnostics standard that is used on a large variety of cars. OBD-II provides access to numerous data from the engine control unit (ECU) and offers a valuable source of information when troubleshooting problems inside a vehicle. If you're not sure if your car works with OBDII you can look under your dash, the connector is generally located below your dash on the driver side. This is great if you want to try to build your own diagnostic reader.
This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.
Skill Level: Noob - Some basic soldering is required, but it is limited to a just a few pins, basic through-hole soldering, and couple (if any) polarized components. A basic soldering iron is all you should need.
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Tested it on a Ford Fiesta 2014. I was able to access data on the CAN bus without any issues.
The male pins are too wide to fit in a standard OBDII port. I am measuring the pin width at 1.8mm while a commercial OBDII scanner has 1.5mm pins.
The female pin ports are measuring up between 1.7mm and 1.8mm.
This port needs more slop! It is designed for 200lb gorillas to be blindly plugging in and tearing out daily. A press fit is not ideal.
I was able to get it to fit into my 2009 Suburu Impreza and I'm a 136lb 5'7" male human. It might be that you got a connector that is on the upper edges of the tolerances of the component.
If you would like, you can contact Techsupport@sparkfun.com and I am sure they can work out an exchange for you if you would like.
Have tested in 4 different makes and models so far and has fit each one perfectly, the part itself feels very sturdy and durable, pins were easy to solder and didn't melt the housing during the process. So far so good...