I KNOW my speed sensor is going out 'cause my speedo has been going on the fritz and last night my D4 light started blinking and I threw it into Neutral to save face but didn't work. Then the check engine light came on so I got off the interstate and turned it off to let it sit for a few minutes. That alleviated all the problems though. I'm bringing 'er in Wed. for a check-up/tune-up.ChrisK said:It means your transmission has registered a trouble code and it is stored in the transmission ECU. It could be a number of problems, but with mileage at 62K, it is more than likely (Or at least hopefuly) the VSS (Vehicle Speed Sensor) going bad. You might be wondering why the VSS might trigger a tranny code, but the transmission reads the VSS to determine when to shift properly, so that is why. Taking it to the dealer to read teh code will give you a definate answer. If your VSS is indeed starting to go bad, than don't be alarmed when your speedometer needle starts acting wierd, and yout check engine light may even turn on. The ckeck engine light also says there is a code stored, and in this case it will also be a VSS code. However, like I said, get the code read from the dealer, as you want to make sure it is not a serious tranny problem as well.