Help please
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
These two errors indicate that the throttle plate sensors are reporting the throttle plate in a position different from what has been commanded.
Inspect the throttle body and observe the movement of the throttle. Most likely the throttle needs replacement, especially if the movement is jerky or limited in range.
Inspect the throttle body and observe the movement of the throttle. Most likely the throttle needs replacement, especially if the movement is jerky or limited in range.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
The throttle body is part number 17113564 .... GM list price is $643.94 
but the good news is the labor should be relatively low .....
If you want the gasket that goes between the throttle body and the intake manifold it is part number 12552542 and is listed at $14.13
You can get the parts for a better price from forum vendors such as ...
http://www.gmpartsdirect.com
or
http://www.gmpartshouse.com
but the good news is the labor should be relatively low ..... If you want the gasket that goes between the throttle body and the intake manifold it is part number 12552542 and is listed at $14.13
You can get the parts for a better price from forum vendors such as ...
http://www.gmpartsdirect.com
or
http://www.gmpartshouse.com
Thread Starter
Advanced
Joined: May 2007
Posts: 86
Likes: 0
From: Aurora IN
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
When the EBCM gets the message it posts the C1278 and disables Traction Control. The Service Manual states this DTC is set as an aid to the technician so that they know the TC system had nothing to do with the issues they are trying to diagnose in the PCM's engine mannagement system.
Thread Starter
Advanced
Joined: May 2007
Posts: 86
Likes: 0
From: Aurora IN
It turned out to be the throttle position sensor. It had shorted out. I hated taking it to the dealer but I had no choice because I am pressed for time. They ran diagnostics and then replaced the sensor. It cost me just about $300. Haven't looked at the reciept to see how much the part and labor was but I know the diagnostics cost $71. Thanks for all the help.
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