Code 21 TPS voltage high?

Hi,

With the throttle closed, it shouldn't be over 2.5v. We may have a short to power or the new part has failed. I have seen a lot of aftermarket parts either not work at all, or they fail after a short time.

I attached the diagnostics below for this code. Take a look at them and let me know if you are comfortable performing them.

Let me know what you find.

Joe'

See pics below. Just a note: With the throttle closed, you should be at approximately 70v.

Does scan mean measure? Because i don't have a scanner but i do have a voltmeter. Just want to make sure so I'm not wasting anyone's time.

Hi,

That means a scanner is used. If you have a multimeter/voltmeter, check the gray wire first for a 5v reference signal. The dark blue wire is the signal return, so that is the one that should be near 0v when the throttle is closed.

When you check for the 5v reference, you can have the connector disconnected. When you check for the TPS signal, it needs to be connected and you need to back probe the dark blue wire.

Let me know what you find.

Take care,

Joe

With the ign on not running i got 5.04 volts on gray wire back probed blue wire n got 4.17 with throttle closed. I slowly opened the throttle and the numbers decreased to 0.3. I also checked for continuity on ground wire back to battery and there is.

Hi,

That sounds like it is working backward. Is the TPS still under warranty? If it is, I would switch it out and see if that changes things. Something isn't making sense. LOL

Let me know.

Joe

I had wires hooked up wrong. Thanks for your time and knowledge. Much appreciated.

Hi,

Thanks for the update. That explains why it seemed to be working in reverse. LOL However, that is a very easy mistake to make.

Regardless, I'm glad to know you got it fixed and it's working properly again.

Take care of yourself and feel free to come back anytime in the future.

Joe