DTC Error Code P0700 2009 A6
Thread Starter
Racer
Joined: Mar 2004
Posts: 469
Likes: 190
From: Garland Tx
DTC Error Code P0700 2009 A6
The check engine light came on after I connected a Cen-Tec (Harbor Freight) code scanner. The scanner shows a pending P0700 DTC and a historic P0700. This appears to to be a communication code for the TCM (Transmission Control Module). The manual says it can only be reset by clearing the TCM emission error code. I can't find the path to clear the TCM code.
The transmission (2009 A6) seems to run and shift correctly in Drive and Sport.
Any suggestions on clearing the code?
What problem would cause a valid code?
The transmission (2009 A6) seems to run and shift correctly in Drive and Sport.
Any suggestions on clearing the code?
What problem would cause a valid code?
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Well we just recently learned that the P0700 doesn't mean anything. It is just the code saying that the trans failed a diagnostic. There has to be another code associated with the condition that caused the diagnostic failure. Anyway, here is that recent thread. It is interesting but you will likely be most interested in posts 16, 22 and 24. Best of luck and let us know what happens: 
http://forums.corvetteforum.com/c6-c...nsmission.html
http://forums.corvetteforum.com/c6-c...nsmission.html
Premium Supporting Vendor
Joined: Nov 2006
Posts: 30,317
Likes: 165
From: Reading PA
I love Harbor Freight, lol. How much did it cost may I ask?
DTC P0700
Diagnostic Instructions
• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination
Circuit/System Description
The transmission control module (TCM) uses the (GMLAN) to signal the engine control module (ECM) that the TCM is requesting malfunction indicator lamp (MIL) illumination. This happens when the TCM has determined that a failure affecting emissions has occurred in transmission control system. When the ECM receives the a message from the TCM, DTC P0700 will set.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The TCM is requesting MIL illumination.
Action Taken When the DTC Sets
DTC P0700 is a Type A DTC.
DTC P0700
Diagnostic Instructions
• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination
Circuit/System Description
The transmission control module (TCM) uses the (GMLAN) to signal the engine control module (ECM) that the TCM is requesting malfunction indicator lamp (MIL) illumination. This happens when the TCM has determined that a failure affecting emissions has occurred in transmission control system. When the ECM receives the a message from the TCM, DTC P0700 will set.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The TCM is requesting MIL illumination.
Action Taken When the DTC Sets
DTC P0700 is a Type A DTC.
