Error code 21: TPS voltage to high

[VN_chris]

I had code 22 TPS voltage to low so i changed the TPS and 2 weeks later i got code 21 TPS voltage to high. Has any one else had this problem? how do i fix it?

[delcowizzid]

9 times out of 10 the plastic adaptor is forgotton and flys off the end of the TPS shaft when you pull it off depending on what model TB you have early ones dont have the adaptor later ones do

[VN_chris]

where is the adaptor? ive pulled the plug out so that i can drive it becaus ewhen i drive with it pluged in it stalls without notice

[delcowizzid]

the adaptor goes on the end of the shaft and then the tps goes on top of it

[VN_chris]

thanks for your help ill check it out

[Bz Kn33z]

I had this problem when putting a VP v8 T/B on my old VN, never worked and error codes came up even got to the point of drilling holes in the tps plastic to make it adjustable worked for abit but still no go. it was loose inside the tps sensor.

[VN_chris]

cant find a plastic adaptor, what does the adaptor do?

[delcowizzid]

if its the TB that needs it it makes the end of the shaft the correct size to fit the tps properly and takes all the slop out of it without it it doesnt zero back to 0 after throttle been applied hench the high TPS voltage flag

[VN_chris]

if its not the tb that needs the adaptor, what other things could cause it?

[VN_chris]

i just pulled it off and had a look at the TB. Thers no gap and it seems to fit snug with some tension on the spring in the TPS, cleared the error codes and its still buggered.

[lukeb25]

how do i lower the voltage on the mainfold absolute pressure senor (map) on a v8 vr commodore ?