Here are the codes...can you help solve the problem?
Thread Starter
Advanced
Joined: Jun 2009
Posts: 67
Likes: 1
From: Albany NY
Here are the codes...can you help solve the problem?
At theend of last summer I posted my car fell into "reduced engine power" a few times after I had my new underdrive pulley installed. At the time it happened I was able to get the car to pull the following codes:
P2135A TPS 1-2 CORRELATION
P2176A MIN TPS NOT LEARNED
Since that time I had it away for the winter and I have decided now is the best time in the winter months to get the problem solved so that it does not happen again. The problem is the dealership cannot recreate the problem since it has been so long since it last happened, so they are unsure exactly what the culprit might be even though I gave them the codes. Does this sound like it may need a new throttle body? Or does it sound more like a software update? From what the dealership says it may need the Idle Control software update? I dont know if one would relate to the other. I can get a great price for a throttle body from gmpartshouse, so I am considering just buying it. But I want to know if anyone has any experience with those codes.
edit: I also had the CEL and other dash lights that usually light up come on that is conducive to this problem.
thank you in advance.
P2135A TPS 1-2 CORRELATION
P2176A MIN TPS NOT LEARNED
Since that time I had it away for the winter and I have decided now is the best time in the winter months to get the problem solved so that it does not happen again. The problem is the dealership cannot recreate the problem since it has been so long since it last happened, so they are unsure exactly what the culprit might be even though I gave them the codes. Does this sound like it may need a new throttle body? Or does it sound more like a software update? From what the dealership says it may need the Idle Control software update? I dont know if one would relate to the other. I can get a great price for a throttle body from gmpartshouse, so I am considering just buying it. But I want to know if anyone has any experience with those codes.
edit: I also had the CEL and other dash lights that usually light up come on that is conducive to this problem.
thank you in advance.
Last edited by InMyRearView; Jan 17, 2010 at 06:41 PM.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
The tps sensors are part of the throtttle body. If the problem happened imediately after the ud pulley, there may be an issue with the calibration due to lower voltage. Did the installer tweak the tune and or bcm? I'm sure I read here that it needs to be done. Also you can view the tps's on a lab scope or modis and look for drop outs or spikes.
Thread Starter
Advanced
Joined: Jun 2009
Posts: 67
Likes: 1
From: Albany NY
The tps sensors are part of the throtttle body. If the problem happened imediately after the ud pulley, there may be an issue with the calibration due to lower voltage. Did the installer tweak the tune and or bcm? I'm sure I read here that it needs to be done. Also you can view the tps's on a lab scope or modis and look for drop outs or spikes.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
Search the forum, otherwise talk to a reputable tuner, Cartek, ECS, LG motorsports and chuck cow to name a few. It's very coincidental how your problem started imidiately following the UD pulley.
Pro
Joined: Jul 2006
Posts: 608
Likes: 1
From: LZ IL
I had the same codes on a car after installing a ported TB. Funny thing was that I cleared the codes and they came back. But when I disconnected the battery then reconnected, make sure the radio and HVAC controls are all off, then start the car and don't touch the throttle for a few mins. No SES lamp.Cleared the codes from history and never saw them again. Give it a try.
Thread Starter
Advanced
Joined: Jun 2009
Posts: 67
Likes: 1
From: Albany NY
yeah I think I will try that. At this point, it cant hurt. I did some searches and found some similar problems and remedies so I think I will try everything and hope that it works. Thanks!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
