fault code 21

[mac1976]

hi all new here great site, a know this is a tps but dont know how to cure this any ideas would be great many thanks oh ots on a c20xe the last of them coil pack john ....

[blue redtop]

hi if its reading 21 code the problem is throttle position sencor high voltage.
i would look at all the wiring and then think about a new sencor

[blue redtop]

i know this as i have the same problem,the engine light comes on now and then but dosent put it in to limp home mode.
i just live with it(for now)