Active Handling/reduced Engine Power
Safety Car
Joined: Oct 2002
Posts: 4,434
Likes: 1
From: Austin TX
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In VI Veteran
St. Jude Donor '03-'04-'05
When mine was acting up, it was throwing a bunch of codes including P0641, U1024, U1017, U1040, U1000, C0242, P2125, P2127, and P2138. And no, I never had a dead battery or low voltage battery or loss of electrical power.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
Originally Posted by GTC
When mine was acting up, it was throwing a bunch of codes including P0641, U1024, U1017, U1040, U1000, C0242, P2125, P2127, and P2138. And no, I never had a dead battery or low voltage battery or loss of electrical power.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
Jeremy
Burning Brakes
Joined: Oct 2005
Posts: 1,131
Likes: 0
From: Dallas Texas
Originally Posted by Brett Hunter
I'm getting way off topic here but isn't 21st Century a GM warranty center now for Corvettes? I seem to remember a post about this in the past.
Drifting
Joined: Sep 2004
Posts: 1,551
Likes: 4
From: Livingston Texas
Originally Posted by GTC
When mine was acting up, it was throwing a bunch of codes including P0641, U1024, U1017, U1040, U1000, C0242, P2125, P2127, and P2138. And no, I never had a dead battery or low voltage battery or loss of electrical power.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
Whenever it happened, it would stay in reduced engine power / service traction system mode until you turn it off and restart it. It was intermittent, but progressively became more and more frequent until it was doing it all the time. Sometimes it would happen when starting the car, sometimes it would hit when I was going down the highway with cruise on, sometimes it would strike when I was merging onto the highway at over 5K rpms, sometimes it would strike when I had it in park with the engine idling, and sometimes it would strike when I was casually driving through my subdivision at around 25mph.
manifold absolute pressure sensor (MAP)
engine oil pressure (EOP)
fuel tank pressure sensor (FTP)
air conditioning refrigerant pressure sensor (A/C)
accelerator pedal position sensor 2 (APP)
P0641 is set when a voltage out of tolerance is detected on the reference signal. P2125,P2127 and P2138 or related to the APP sensor 2 and are only active if P0641 is not set. C0242 is just saying that the traction control systems is unable to operate. U1000 and the other codes are loss of signal from the modules. Have they checked the voltage at the other modules?
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
Originally Posted by Brett Hunter
P0641 is related to the 5v reference voltage for the following:
manifold absolute pressure sensor (MAP)
engine oil pressure (EOP)
fuel tank pressure sensor (FTP)
air conditioning refrigerant pressure sensor (A/C)
accelerator pedal position sensor 2 (APP)
P0641 is set when a voltage out of tolerance is detected on the reference signal. P2125,P2127 and P2138 or related to the APP sensor 2 and are only active if P0641 is not set. C0242 is just saying that the traction control systems is unable to operate. U1000 and the other codes are loss of signal from the modules. Have they checked the voltage at the other modules?
manifold absolute pressure sensor (MAP)
engine oil pressure (EOP)
fuel tank pressure sensor (FTP)
air conditioning refrigerant pressure sensor (A/C)
accelerator pedal position sensor 2 (APP)
P0641 is set when a voltage out of tolerance is detected on the reference signal. P2125,P2127 and P2138 or related to the APP sensor 2 and are only active if P0641 is not set. C0242 is just saying that the traction control systems is unable to operate. U1000 and the other codes are loss of signal from the modules. Have they checked the voltage at the other modules?
Jeremy
Safety Car
Joined: Apr 2005
Posts: 4,769
Likes: 0
From: SFV CA
I've had the "reduce engine power" happen to me twice, only when I push it beyond around 6K rpms, and it doesn't happen all the time. But once I disconnect the battery for a minute or two, it's all back to normal. I've been out of town recently and haven't had the chance to bring to A&A Corvette for a checkup.
Jeremy: Still happening??
UDRIVESLOW: I'm in So Cal., where is your dealer located?
Jeremy: Still happening??
UDRIVESLOW: I'm in So Cal., where is your dealer located?
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Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
Originally Posted by Brabus2
I've had the "reduce engine power" happen to me twice, only when I push it beyond around 6K rpms, and it doesn't happen all the time. But once I disconnect the battery for a minute or two, it's all back to normal. I've been out of town recently and haven't had the chance to bring to A&A Corvette for a checkup.
Jeremy: Still happening??
UDRIVESLOW: I'm in So Cal., where is your dealer located?
Jeremy: Still happening??
UDRIVESLOW: I'm in So Cal., where is your dealer located?
No problems thus far...(fingers crossed)...
,hopefully the replaced sensors fixed it... however I won't hold my breath... 
Jeremy
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Originally Posted by Mr.Big
Same problem here and it gets progressively worse, just as you said... It's hard to go from 620rwhp to 100rwhp...I'll keep you informed of my findings...
Jeremy
Jeremy
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Originally Posted by dennis50nj
this problem will never be fixed 
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
Originally Posted by MSammet
Ahhhh Hah ! I just knew if you kept using Midnite's secret gas formula something bad would happen. You can't mix Everclear with Mad Dog 20/20.
Jeremy
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Groan :(
I sure wish 21st or RPM would get the darn LS2 edit software for the '06. This is driving me bonkers. 
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
Struck again yesterday after 2 weeks of being fine... I see that the A/C refrigerant sensor is on the 5volt ref. I have had problems with my A/C blowing hot more than usual lately... I've seen where others with this problem had systems that were evacuated down to 1.1lbs from 1.4lbs... and it fixed the problem... I wonder...
Jeremy
Jeremy
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Good grief ! The more '05 problems I see posted on this forum, the happier I am that I traded for an '06. I'm beginning to think that the '05 gremlins are going to be problematic. And now, back to the second game. 
Racer
Joined: Jul 2005
Posts: 420
Likes: 14
From: California
Cuts out after wash
Originally Posted by dennis50nj
my o5 a4 has this problem every time ifloor it right before second gear shift but only when rain after it stops or when i wash car low coolant sensor replaced steering sensor replaced massair flow sensor replaced abs module replaced if i take out on sunny days only dont wash never happens
My 2006 has done something similar after washing on two different occations. Upon acceleration, it cuts out, almost feels like the rev limiter, but at lower RPM's - anyone else?
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
I think y'all are using the wrong tooth paste or deoderant. Something anyway ! Over 6k on 3mo old A6 and drive it daily. Could this be the problem ?
Something anyway ! Over 6k on 3mo old A6 and drive it daily. Could this be the problem ?
