I have a 89 f150 and the check engine light has been on since I bought it so I got it check it throws only four numbers 97 63 what do they mean please help My truck idles up and down if that helps any

 

63- TPS Sensor signal below minimum- possible short
97- Overdrive cancel indicator light, circuit failure.

 

What is a overdrive cancel indicator light circuit failure. And could my tps be bad than

 

I would say your tps is bad, your overdrive code, when driving your truck does the od light flash. It could be your tranny is on its way out,or its possible the overdrive code is a side effect of the bad tps.

 

Your TPS may be bad, but it could also just be the wiring or the connector. Check the witing going to and from your TPS and clean off the connector and see if that helps. I'm not familiar with the O/D light or anything, so I won't be much help there. After you do a once over on the wiring and clean the connector, check your codes again to see if the TPS code is still there. Before you check codes, you will want to disconnect the negative terminal on your battery for 10+ minutes to clear your current codes, then bring your truck up to temp and see what's there.

 

I don't see any overdrive light anywhere and my trans shifts and works fine and I thought it was my tps since my truck idled weird but the overdrive thing is what worries me

 

The 97 code is for the later models (95 & 96) and applies to the E4OD transmission that is why you can't find that overdrive light.

 

Put new tps on yesterday. Check engine light is gone now and runs alot better thanks guys