A P0700 code in the Cadillac CTS indicates an issues with the transmission control module. The given definition is "Transaxle Control System Malfunction". It is usually caused by a short or open circuit in the TCM or the module itself is faulty. You should start by checking the wiring harness and connectors for any visible damage such as bends or broken parts. The pins on the connectors could also have corrosion. Generally this code will be accompanied by an illuminated Check Engine Light and additional codes from the TCM. Other symptoms You may experience when this code is triggered are poor gas mileage, stalling of the engine, and transmission shifting. The typical cost to have this code diagnosed is $75 to $100.
Erin R
July 30, 2020
P0700 is set to the Cadillac CTS when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set the Check Engine Light and trigger a failure mode. Once the failure mode is set, it will remain until the fault has been repaired or normal operation has been detected.
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