What is the U0103 fault number? What is the description of the Lost Communication With Gear Shift Control(GSC) Module Fault? How can you fix the U0103 fault code What are the causes and symptoms for the U0103 ?….error code
What is the U0103 Fault code? What does it stand for?
The automotive industry’s most common circuit for control modules and other electronic parts to communicate is the. “Controller Area Network (CAN)” bus. The manufacturer will pre-program the data to be sent to the modules. Operating information and commands can also be exchanged via CAN bus.
Two special copper wires called “CAN High” (high) “CAN Low” They are used for communication. They come in different colors. The wires are arranged in different colors. When there is no data transmission, both wires have 2.5V. Data transmission causes the high priority wire to rise to 3.75V while the low priority line drops down to 1.25V. This creates a 2.5V voltage difference between the lines. The voltage difference between two bus lines is the basis of communication.
Fault code U0103 occurs when the Gear Shift Control module (GSC), and other control modules within the vehicle are unable to communicate with one another.
The U0103 fault code can affect vehicles of all makes and models, including but not limited to: Dodge, Volkswagen, Jeeps, Audi, Chrysler. Chevrolet. GMC. Cadillac. Ford. Mazda.
What causes the U0103 Fault code?
Below are some reasons why U0103 should be assigned:
- – The wires are damaged, melted, broken, or corroded, which can cause an open or brief circuit in the bus.
- – Weak connections or open or short circuit problems with the wiring to the shift controller module.
- – Broken or bent pins in shift control module sockets
- – Blown Fuses
- – Defective shift control module (rarely)
What are the symptoms for U0103’s Fault Code?
The following symptoms may be present in vehicles with code U0103:
- – Illumination for the check engine light
- Transmission may not shift and remain stuck in any gear.
- – The transmission will not shift to neutral (Neutral), gear
- – Other related fault codes
How to Fix the U0103 Fault Code
There are several repairs that can resolve the U0103 fault code.
- – Repair and replacement of damaged, melted or corroded wires that cause an opening or short circuit on CAN bus
- Repair or replacement for damaged, melted or corroded wiring to the shift controller module that causes an open or short circuit
- – Replacing blown fuse
- – Clean the connectors of the shift control module.
- – Repair of bent pins or broken socket pins
- – Replacing a faulty shift control unit
How serious is the U0103 Fault code?
If this code is set, it means that your vehicle faces a serious problem. U0103 can lead to the transmission not shifting at all, being stuck in any gear, and even being unable to shift out from neutral. This will cause the vehicle to be undriveable.
