P0121 Explain Please!
P0121 Explain Please! Hey Guys, I have a 01' Trans am bolt on car with a "large" cam and I'm constantly getting the p0121 code. I've seen tons of threads saying to -Disable the code -Drill the throttle blade -flip the blade set screw to adjust it properly- etc.
Can anyone break that info down and go into detail on the best method to get this code to stop coming up? I have a Thinkcar scan tool, and I'm not opposed to drilling the blade etc. I've seen some guys say that after adding another 1/8th hole to the blade the car was more responsive and ran better etc.
Can anyone break that info down and go into detail on the best method to get this code to stop coming up? I have a Thinkcar scan tool, and I'm not opposed to drilling the blade etc. I've seen some guys say that after adding another 1/8th hole to the blade the car was more responsive and ran better etc.
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
You have to get your iac count in the proper range than do a tps reset. https://ls1tech.com/forums/pcm-diagn...reset-tps.html
Some have to drill some are able to adjust throttle blade with set screw. If you adjust blade you have to make sure the voltage is below .6v closed after tps reset for it to work properly or it won't use the idle parameters.
Some have to drill some are able to adjust throttle blade with set screw. If you adjust blade you have to make sure the voltage is below .6v closed after tps reset for it to work properly or it won't use the idle parameters.
