Throttle Percentage @ Idle

[bcrooms]

My '07 Z71 has been giving me the P0121 code for awhile and I noticed when I run the live data on my reader, that TP % stays around 25 % when the truck is at idle.

 

Is that normal? Seems like it should be close to 0% when the throttle isn't being pressed.  What should I check?  I do have a replacement accelerator pedal w/ sensor from AC Delco

 

Any recommendations are appreciated!

 

-Brandon

[swathdiver]

That's a code for a bad TPS sensor 1 on an NNBS.  You have two right along with drive by wire?

[bcrooms]

2 minutes ago, swathdiver said:

That's a code for a bad TPS sensor 1 on an NNBS.  You have two right along with drive by wire?

Not sure what you mean by "two right along". 

 

The only one I'm aware of is attached to the accelerator pedal.

[swathdiver]

Sorry for the poor grammar this morning.  I believe that your truck, like mine, is drive by wire.  No cables going to the throttle body.  If that is correct then you have 2 throttle position sensors.  Code P0121 means the 1st sensor has gone bad and needs changing.  

[bcrooms]

1 minute ago, swathdiver said:

Sorry for the poor grammar this morning.  I believe that your truck, like mine, is drive by wire.  No cables going to the throttle body.  If that is correct then you have 2 throttle position sensors.  Code P0121 means the 1st sensor has gone bad and needs changing.  

Sorry on my part too, it's been a busy morning.  So the 1st sensor would be the one on the throttle body correct?

[swathdiver]

Yes, if yours is NNBS, the computer sees that as two sensors.  

[bcrooms]

2 minutes ago, swathdiver said:

Yes, if yours is NNBS, the computer sees that as two sensors.  

It is the new body style. I'll try to pick one up at the parts store today

[bcrooms]

On 4/13/2018 at 10:36 AM, croomz said:

It is the new body style. I'll try to pick one up at the parts store today

Apparently the new pedal fixed it.  Light has been off since replacement.

[Supreme Pizza]

Awesome.