reduced engine power for 3rd time, LS2
Thread Starter
On The Tree
Joined: Oct 2011
Posts: 130
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From: new york
reduced engine power for 3rd time, LS2 Today, for the 3rd time in approx. 4 weeks, my ls2 went into "reduced engine power" mode and the engine light and TC light remains on. I was doing about 60mph on the highway, just cruising and it came on. The first 2 times, i resetted the ECM by pulling the 10A fuse underhood. It seems to hold the engine light from not coming on for about a week or so, then reduced engine power comes back and will not go over 2000rpm. Any suggestions? I really dont have access to a scanner. I know tonite im going to pull the fuse and everything will be good again but give it a week or so and it will be back. btw the car is a 06 cts-v and is bone stock
Last edited by family-man; Feb 14, 2012 at 04:52 PM.
The engine light comes on because there is a code set. It will be throttle related since it goes into reduced engine power mode. Until you get the code no one can help you.
Thread Starter
On The Tree
Joined: Oct 2011
Posts: 130
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From: new york
So i reset the ECM again, if i DONT wait till the engine light comes on, will i still be able to pull the code beforehand? Reason im asking is because the only day i can really get time to scan it by a shop is Saturday, but lets say it comes on again on a tuesday, and i dont want to be driving with the reduced power for 4 days till i can make the shop hours...
also, is there any risk driving with reduced power?
also, is there any risk driving with reduced power?
Last edited by family-man; Feb 14, 2012 at 11:18 PM.
Looking like an idiot? 
Sorry I couldn't resist. You need to buy yourself a $30 bluetooth scanner off ebay. That and your smartphone running "torque" will become your best friend for reading/clearing codes. And good luck with your issue I too have a REP issue and its annoying as all hell.
Sorry I couldn't resist. You need to buy yourself a $30 bluetooth scanner off ebay. That and your smartphone running "torque" will become your best friend for reading/clearing codes. And good luck with your issue I too have a REP issue and its annoying as all hell.
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My buddy had the same problem in his 05 V, ended up being a bad throttle body (kept throwing the same throttle position codes). He replaced it and afterward it drove just fine.
If it was modded, I would've said that some airflow tables would have to be updated to increase the threshhold of when the car goes into reduced power, but I doubt that's the case with your bone stock car. My guess is a bad motor in the throttle body throwing a code and the pcm reacting to that code by going into reduced power mods.
If it was modded, I would've said that some airflow tables would have to be updated to increase the threshhold of when the car goes into reduced power, but I doubt that's the case with your bone stock car. My guess is a bad motor in the throttle body throwing a code and the pcm reacting to that code by going into reduced power mods.
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Registered User
Joined: Feb 2012
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From: Chicago
This will sound crazy but when I was a mechanic in Iraq I used to get all kinds of GM cars and trucks with the same problem. All we ever did because of lack of parts was remove and cleaned the throttle body with brake cleaner because that's all we had and it fixed the problem everytime. Hope this helps, but I would use something other than brake cleaner, also we cleaned around the intake.
Thread Starter
On The Tree
Joined: Oct 2011
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From: new york
This will sound crazy but when I was a mechanic in Iraq I used to get all kinds of GM cars and trucks with the same problem. All we ever did because of lack of parts was remove and cleaned the throttle body with brake cleaner because that's all we had and it fixed the problem everytime. Hope this helps, but I would use something other than brake cleaner, also we cleaned around the intake.
should i pull the throttle body off the intake, or just take the air intake tube off and clean if i do need to remove the TB will i need to use a new gasket or can i still re-use my existing gasket?
and if you guys used brake cleaner. Brake cleaner is recommended or carb/tb cleaner is better..and will i run into an issues cleaning my DBW TB?
Last edited by family-man; Feb 15, 2012 at 10:58 AM.
It is best to remove it to clean it. Hold the motor part to the top so that none of the cleaner gets into it. The gasket is usually fine to reuse. Some cars need the idle relearn done with a scan tool after having it cleaned or you will run into more problems.
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My buddy had the same problem in his 05 V, ended up being a bad throttle body (kept throwing the same throttle position codes). He replaced it and afterward it drove just fine.
If it was modded, I would've said that some airflow tables would have to be updated to increase the threshhold of when the car goes into reduced power, but I doubt that's the case with your bone stock car. My guess is a bad motor in the throttle body throwing a code and the pcm reacting to that code by going into reduced power mods.
If it was modded, I would've said that some airflow tables would have to be updated to increase the threshhold of when the car goes into reduced power, but I doubt that's the case with your bone stock car. My guess is a bad motor in the throttle body throwing a code and the pcm reacting to that code by going into reduced power mods.
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
You are addressing a TEN YEAR old thread.
Also, try not to use one long run-on sentence in your posts. VERY hard to read.
