Overdrive light stays on

Hi Mr. Ocha,

I just want to confirm the light is staying on consistently and not flashing. If it is flashing then you need to pull codes and repair as soon as possible because it could cause damage.

If it is steady then it could just be a shifter issue. I would still suggest pulling codes and seeing if you have a circuit issue. It could be the button itself being shorted, wiring, or even a PCM issue however, I would suspect a button issue. A lot of times these just get contaminated with dirt, grime, drinks spilled on them and other stuff.

Hopefully you have a code and that will get us to a resolution quickly. Let me know what you find and we can go from there. Thanks

I would see if you can get the codes out of the PCM. I suspect you have a circuit code but that will be more definitive. If you don't have a code reader most parts stores will pull them for free for you.

I think you have a button that is shorted. This is a normally open switch which means the PCM is not getting a voltage signal but when the switch is closed it get a signal on this circuit and turns off OD.

If you can't get codes the best way to test this is to measure continuity on Pins 5 and 6 of the switch in both switch positions. If you have continuity in both positions then this is your issue. You should have an open in one position and continuity in the other.

Okay. Then I suspect it is the switch itself not a circuit issue. If the switch is shorted then the PCM just thinks the button is pressed so it turns off OD.

I will wait to hear back. Thanks.

That is great! Glad to hear that is all it took. Thanks for the update, this information will surely help others that have this issue. Thanks for using 2CarPros.