Some OBD Web Links
Here are some links to reference material, and products that you may find useful. We've split them
into four sections:
Standards Organizations and Documents
A serious hobbyist will want to obtain the relevant standards for reference. Many are available
for sale through the following sites, but be warned - somes are fairly expensive:
Scan Tools and other Hardware
A quick search with Google will provide many links,
but to get you going, here are a few handy ones:
Actron Automotive Test Equipment offers ready-built code readers,
and also provides a handy trouble code lookup.
Automotive Electronics Services has lots of diagnostic tools.
Dyno-Scan scan tools and software.
AutoTap needs little introduction. An excellent tool brought to you by
Autoxray is a maker of several automotive scan tools.
Blue Streak Electronics have a 3 in 1 BDM Pro kit for serious troubleshooting.
We are often asked where the OBDII (J1962) connectors are sold - CarPlugs.com is
one source to try.
Digimoto no longer sells ELM-based products, but they still have some well
respected vehicle diagnostics software, as well as good interfaces.
DG Technologies make a number of vehicle interfaces - most notably the Gryphon.
They do host a number of courses too, for those that want to go beyond the basics.
Ferret Instruments offer several automotive analyzers.
Hickok makes the New Generation STAR factory scan tool.
Formerly OnBoardDiagnostics.co.uk, Ilexa Onboard Diagnostics offer a variety of
tools. Volkswagen, Seat, Skoda and Audi owners will be interested in their VCDS, and
the Opel and Vauxhall owners will appreciate the VAUX-COM.
Omitec Interro are makers of handheld automotive diagnostic systems.
Kuester DatenSysteme offer a variety of interfaces and parts.
LapLogger offer software and interface packages for most platforms.
Mediakit2010 offer a very wide range products, including several that use
our ICs (USB and BlueTooth versions, too). Be sure to have a look at their site. They're
based in Spain, which may be of advantage if you are in Europe.
Millisi Corp. offer several interfaces, both for VAG and for OBDII.
Nexiq makes several interfaces, including ones for big rigs.
Alex Peper's site - ICs, interfaces, and software for the experimenter.
An extensive OBD site. Primarily in German, but there are links
that provide translations to several other languages as well.
OBD2AllInOne.Com offers a low cost ELM327 based tester, if you would
prefer to buy rather than build. For those that are looking for OBD1 devices, this
same group operates the ALDLCable.com
Looking for a reasonably priced OBD cable for your project? Have a look
Lots of good bits of OBD info.
Harrison R&D have been around for many years. They offer interfaces and
software (for Windows users).
UK-based SK Pang Electronics offer ELM327 based OBD interfaces and
parts for the experimenter. They also carry VAG-COM interfaces (which ELM chips do not support),
and a lot of other neat things for the experimenter.
Snap-on Inc offers quite a range of diagnostics tools for the industry. They
were once too expensive for the average homeowner, but you may now be surprised to see how
competitive they've become.
UKOBD Ltd. is a UK-based distributor of scan tools (mostly mOByDic and Autel).
Decoding Trouble Codes
Many of the software programs for the ELM OBD products will provide a description of the Diagnostic
Trouble Codes (DTCs) for you, but some times you may just want a different description. Here are
some links to sites that may be of help to you:
Actron's code lookup
The Actron Diagnostic Trouble Code (DTC) Definitions page seems to offer a
large number of B and U type codes that others do not.
About.com's OBD codes database
This site is pretty good for older (pre-OBDII) vehicles. For newer (OBDII)
vehicles, they direct you to the OBD-Codes site
A pretty good bare bones site for looking up codes.
Gendan's online DTCodebank for OBDII, EOBD, and VAG trouble code definitions.
Trying to read a code from and older (pre-OBDII) vehicle? Bat Auto's Trouble
Codes web site may be able to show you how.
An interesting site for learning more about the OBD codes. In addition
to the basic descriptions, they also offer troubleshooting tips, symptoms, and
Other Helpful Links
From time to time we come across useful resources that we think should be shared. Here are
a few of the latest ones:
Wikipedia - OBDII PIDs
Wikipedia is always a good resource, and OBD is no exception. If you are
looking for a particular piece of information from your vehicle, it may be available through
one of these standard PIDs.
Auto Repair - Answers.com
This site is a resource for individuals that want to learn more about car care
This link now redirects you to the Bat Auto Forums - a good source of info.
International Automotive Technicians Network
Is a resource for automotive professionals.
AutoTap's OBDII Page
Rick's Free Auto Repair Advice
This site may not cover every vehicle, but there is a lot of advice for those that it