How to Deal with P0700 Transmission Control Module Malfunction?

1 Answers
DelNova
07/25/25 3:14pm
When the P0700 fault code occurs, the vehicle should be promptly sent to a 4S shop or repair shop for maintenance. 1. Description: The appearance of the P0700 fault code indicates a malfunction in the transmission, but specific data flow analysis is required. Generally, sporadic faults can be resolved by clearing the fault code. 2. Working Principle: The P0700 fault code signifies a transmission control system malfunction (Malfunction Indicator Lamp request). The Transmission Control Module (TCM or TCU) collects information from various sensors and the Engine Control Module to assist the transmission in determining the appropriate shifting, thereby improving vehicle performance, ensuring stable gear shifts, and saving fuel. The Malfunction Indicator Lamp (MIL) serves to illuminate a yellow or red engine symbol on the dashboard when the control module detects a fault. This fault code indicates that the Powertrain Control Module (ECU) has received a request from the Transmission Control System (TCU) to illuminate the Malfunction Indicator Lamp.
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