Question about Cars & Trucks
DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination
DTC P0700 can not be cleared from the ECM until the related TCM codes have been cleared.
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.
You don't say which engine your's has ! Or which transmission .
Automatic Transmission - 4L60-E/4L65-E/4L70-E
You need to have TCM checked for codes .
Posted on Dec 22, 2016
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Posted on Jan 02, 2017
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