Chrysler Repair: check engine light: how to find out what it means, chrsyler, engine controller

Question
i have a 1995 chrsyler concorde and the check engine light keeps coming on,  when i take it in to the shop , it doesn't come on, so they say everything is okay.  

Answer
Hi Linda,
I assume that you mean the light comes on while your are underway on the road and then goes out (it will always come on when you first turn the key to run, before starting the engine, as a check that the light works). When the light comes on while the engine is running it means that a fault has been detected by the engine controller and recorder as a two-digit number in the memory. You can readout the memory to learn what the fault code is:
Try using the ignition key: turn it "on-off-on-off-on" and leave it "on" (doing this quickly, no longer than 5 seconds). By "on" I mean just the normal position when the engine is running, not the cranking position. The 'check engine' light will remain on when you leave the key in the "on" position with the engine still not running. But then watch the 'check engine' light to begin flashing, then pause, flashing, pause, etc. Count the number of flashes before each pause and keep track of the numbers. Repeat the readout and verify the counts are correct. Then group them in pairs in the order that they came out, thus forming two digit numbers. You may notice that the pause is shorter between the digits of a given number, and longer between the numbers themselves. Then send me a 'follow-up' question telling me the results of your readout. By the way, 55 will be the last number (two groups of 5 flashes each) and that is the code for "end of readout".
I have the troubleshooting manual for the 3.3 and 3.5L engines and we can look up the possibilities of what is wrong based upon what fault codes you show. There is also an essay on fault codes at the site:
http://www.allpar.com/fix/codes.html
which gives the meaning of the code numbers. But then you need to get specific info for what exactly might be the diagnostic tests or parts to replace to complete the repair. Let me know the codes and I can give you some direction.
Roland