P2119 amd P2176
P2119 - Throttle Closed Position Performance
P2176 - Minimum Throttle Position Not Learned
P0420 - Catalyst System Low Efficiency
I have the stock tune installed because I have been diagnosing the vibration/shudder stemming from DOD. I have the 420 error due to my downpipe and not having a tune installed to delete the code.
Now a little history. I arrived home from vacation on the 5th of October after being gone for a week, so the car sat. Car didn't start right away, threw a code went into reduced power mode. I reset it, car started fine, the code was something to do with the idle. Same thing happend two days later on the 7th. Same situation, I got a fresh tank of good gas and no problems since. This morning car won't start, goes into reduced power mode and throws 2 codes, the two above. I run 93 octane and usually run a tuned car but have been running the stock tune for about a week going on a week and a half now.
Thoughts?
Thanks,
John
P2119 - Throttle Closed Position Performance
P2176 - Minimum Throttle Position Not Learned
P0420 - Catalyst System Low Efficiency
I have the stock tune installed because I have been diagnosing the vibration/shudder stemming from DOD. I have the 420 error due to my downpipe and not having a tune installed to delete the code.
Now a little history. I arrived home from vacation on the 5th of October after being gone for a week, so the car sat. Car didn't start right away, threw a code went into reduced power mode. I reset it, car started fine, the code was something to do with the idle. Same thing happend two days later on the 7th. Same situation, I got a fresh tank of good gas and no problems since. This morning car won't start, goes into reduced power mode and throws 2 codes, the two above. I run 93 octane and usually run a tuned car but have been running the stock tune for about a week going on a week and a half now.
Thoughts?
Thanks,
John
When you turn the car off is the throttle body clicking to reset itself ?
As for Minimum Throttle Position Not Learned the computer will look at the throttle assuming nothing is pressing on it and set that as 0 make sure your floor mat isnt pressing on the throttle at all when starting "this could be whathappened if you only got the code once"
This code can also be thrown if the throttle plate gets stuck and wont close all way.
When you got this code did it rev unsually ?
If its only happened 1 time i wouldn't worry about it. If this is happening everytime and you don't have a warranty then i would clean the connectors with dielectric grease
Last edited by Sint3k; Oct 24, 2008 at 11:48 AM.
As for the reset click, never noticed it, so not sure.
06MonteSS / DiabLew Tune

2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
Trending Topics
The Best V8 Stories One Small Block at Time
According to this thread I might need a new PCM...
(So far they flashed the computer and replaced the battery)
https://ls1tech.com/forums/conversio...velle-ls2.html
Any GM Techs have any thoughts on this?
Thanks,
John




