I have a 1998 Mazda Millenia with a check engine light that is always on when the vehicle is on. I had it checked out at the Mazda dealership and they said that it was a faulty "knock sensor". The car is otherwise symptom free. I'm only having the car repaired because I'm getting ready to trade the vehicle in. Any ideas as to what to do. Thank you.

 

Drive to your local AutoZone parts store (or try Advanced if there isn't an AutoZone around). They will do a scan for free. When they tell you the results (presumably it will confirm what the dealer already told you), have them pull the required part off the shelf and show it to you so you will know what you are looking for. They may also be able to point out the installed location on your vehicle.

You can also try looking up the knock sensor here:

http://www.cybrrpartspro.com/Manual%...delLookup.html

Good luck.

 

Here are some AutoZones in your area:

332 Route 28 Iyannough Rd,
Hyannis, MA 02601
(508) 771-7373

6SE 1070 Route 28
S Yarmouth, MA 02664
(508) 394-5489

18W 2991 Cranberry Highway
E Wareham, MA 02538
(508) 295-5700

19SW 64 Davis Straits(Rt 28)
Falmouth, MA 02540
(508) 457-9431

 

I agree with TowGuy.

Your other option is to have the light shut off right before you trade it in. If it doesn't go on when they inspect the vehicle, you're in .