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read my answer to reseting engine codes below...2001 olds silhouette..
what buttons are used to bring up codes on display of 1994 cadillac etc
Check with a local auto parts outlet store like Autozone or Pep Boys. Some will do this for free or a small charge. You can buy the decoder, too.
All common GM vehicles from the early 1980's to mid-1995 have an ALDL diagnostic terminal with 12 posts, one of which is the diagnostic post. If you ground that post and turn key on, the check engine light will flash a series of codes starting with 12. The flashes are done three times for each stored code. Record those after the 1-2 flashes and before the 1-2 goes again. The codes are only displayed in numerical sequence, not as to when they happened. One of the terminals is a ground so you could use a paper clip for the connection. Once you have the codes, you need to find the meaning in a good repair manual. In late 1995, and all 1996 GMs and later have and OBD II terminal, and you need a computer tester to do codes. Fortunately many part stores have these and will do it for you. NOTE: There is a hybrid system in mid-1995, like my '95 Olds Achieva that have no easy way to get codes. It is not a late connector nor does it have all the wires like early GMs to clip. You will see only 3 wires and these take a special uncommon meter to read...see your mechanic....Enjoy Dan
Take it to auto zone and have the codes read for free.
Go toa Nissan dealership to have the codes read.
The ideal way is to read them with a scan tool, fix the problem , and then reset them with the scan tool. Failing that you can unhook the battery and reset the codes until the failure reoccurs.
A few can, but most four-year olds cannot read.
TAke it to auto Zone They will read the codes free.
Many places do not want to put an OBD reader on if the check engine soon light is not on. However, the codes ARE stored in memory. Get yourself a Haynes Repair Manual for your vehicle (or check at your local library to see if there is one available), go to Chapter 6 and read how you can retrieve the codes yourself - also listed are all the codes and what each one means. Good luck. In 1996, computers changed to save codes. ( OBD II) . Many parts houses can read the codes.
check your exhaust it could be you cadilidic converter Have someone read the codes that are set. The codes will help lead you to the problem.
how do you read transmission codes in a 94 vw jetta?