question about speed sensors?

Asked by May 25, 2013 at 09:34 PM about the 1988 Buick Reatta STD Coupe

Question type: Maintenance & Repair

i have a 1988 reatta which runs great, however the dash speedometer just reads 0 and will
not clock miles ,also it triggered  the computer system saying it has an electrical
problem, and now the check engine light came on too

2 Answers

69,405

It's most likely the vehicle speed sensor. This sensor is mounted on the automatic transmission. It has a two way electrical connector on it. Check out rockauto.com. After you put in your vehicle information click on the category marked "electrical". Then click on vehicle speed sensor. It will show you a picture. The vehicle speed sensor replaces the conventional speedometer cable that you'd find on older cars. The sensor basically tells the computer how fast your going so the computer can indicate that information on the speedometer and calculate miles traveled for the odometer to work as well. Once repaired disconnect the negative (-) battery cable for about 3 minutes to clear any trouble codes. HTH -Jim

3 of 3 people found this helpful.

thank you very much we will give this a try, have a safe and enjoyable weekend

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