Join Date: Jun 2006
Location: Eastern ON Canada
Car: 07 OBW 2.5i D-4AT
Feedback Score: 5 reviews
The symptom was transmission-related. The P0700 is a "MIL request" but does not identify the actual cause.
When certain faults are detected in the transmission control area by the transmission control module (TCM or TCU), the module will not only record a transmission trouble code and turn on the Sport light, but also sends a P0700 to the engine control unit (ECU), which turns on the CEL (MIL). Whenever a CEL is triggered the cruise control is automatically disabled, resulting in the flashing CC light.
The stumbling and stalling might have been related to the engine control system going into a "failsafe" mode to protect the transmission, or it's possible that the transmission malfunction caused the engine to stall (as might be the case if the torque converter lock-up clutch engaged prematurely).
I'm not familiar with your Cobb AP, but many scanners/code readers cannot access the TCU to read transmission trouble codes. The P0700 is an ECU code which is readable.