Chrysler Repair: 1992 Plymouth Voyaguer, code translation, voyaguer

Question
When you drive along the vehicle will just shut off it will restart.  I have changed the O sensor.  What else could make it do this.  

Answer
Hi Diane,
It might be a loose wire, or it could be a flakey sensor. The latter can usually be identified via the on-board fault code system that records engine function problems as two digit numbers (codes) in the controller of the engine.  The most useful thing to do would be to try to get the fault codes that may stored in the engine controller memory to readout. 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 several engines and we can look up the possibilities of what is wrong based upon what fault codes you show. When you write back tell me what engine is in the van.
You can get a code translation table at
www.allpar.com/fix/codes.html but it is not specific as to what to do to effect the repair.
Roland