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Just got my coupe about a week and a half back, and I noticed the other day that my D4 light was blinking. Now by today being Saturday and the shop won't open back up until Monday, should I be real concerned that I might be losing a gear, or is it some type of sensor light that I can get under and fix myself? I don't feel any probs with the tranny except from first to second, but since I do a lot of highway driving, the blinking D4 is really making me crazy. Holla back if anyone can advise.
 

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Don't you just love it when someone asks you to "throw parts" at a problem? While the problem may indeed be a failing vehicle speed sensor, the correct procedure is to retrieve the code which will inform you EXACTLY as to what constitutes the problem. The flashing D4 is to alert you that a hard code has been set due to a component failure.
 

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ok this sounds familar after i got my coupe back from a newe tranny the d4 light with blink n the tranny would get a lil jerked from 1 to 2 sooo i brought it back n over a series of 4 times he found there was a eetical problem with the comp. n he brough tit to a electronic specialist n found the prob also my d4 light was blinking liike 1 yr before that due to the vss. if thats the case your speedo will go crazy n some3otimes not work at all i hope this could help jon
 

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LPB said:
Don't you just love it when someone asks you to "throw parts" at a problem? While the problem may indeed be a failing vehicle speed sensor, the correct procedure is to retrieve the code which will inform you EXACTLY as to what constitutes the problem. The flashing D4 is to alert you that a hard code has been set due to a component failure.
True in some cases, but IN 99.91% of the time, this has been the case. Some of us do work on Legends around here, or have been in this situation before. No guesstimating here. You are right about the hard code failure...check in the Helms.Here's one such incident...
 
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