The ODBII code U1776 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a possible issue with wiring, connectors, or the TCM itself. The severity of ODBII code U1776 is moderate to severe. Common Causes For: U1774 U1774: Transmission Control Module Communication Error Faulty Transmission Control…

The ODBII code U1777 indicates a “Module Communication Fault,” which means there is a communication issue between the vehicle’s control modules. The severity of ODBII code U1777 is generally considered moderate. Common Causes For: U1776 U1776: Transmission Control Module Communication Error Faulty wiring or connectors Failed control module Corrupted software or firmware Poor ground connections…

The ODBII code U1779 indicates a communication issue where a control module is not able to communicate on the vehicle’s communication bus, often due to a fault in the module or wiring. The severity of ODBII code U1779 is moderate to severe. Common Causes For: U1777 U1777: “Module Communication Fault” Faulty control module Damaged wiring…

The ODBII code U1780 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in data transmission or connectivity. The severity of ODBII code U1780 is generally considered moderate to high. Common Causes For: U1779 Control Module Communication Bus Off. Faulty Transmission Control Module…

The ODBII code U1781 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a failure in data exchange or connectivity. The severity of ODBII code U1781 is moderate to severe. Common Causes For: U1780 refers to a communication issue related to the transmission control module (TCM)…

The ODBII code U1782 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a failure in data exchange or connectivity. The severity of ODBII code U1782 is moderate to severe. Common Causes For: U1781 Transmission Control Module (TCM) Communication Error. Faulty Transmission Control Module (TCM) Damaged…

The ODBII code U1783 indicates that the Transmission Control Module (TCM) has lost communication with the vehicle’s communication bus, which may affect the transmission’s operation. The severity of ODBII code U1783 is moderate to severe. Common Causes For: U1782 Transmission Control Module (TCM) Communication Error. Faulty Transmission Control Module (TCM) Damaged wiring or connectors in…

The ODBII code U1784 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in the data transmission network. The severity of ODBII code U1784 is generally considered moderate to high. Common Causes For: U1783 Transmission Control Module (TCM) Communication Bus Off. Faulty Transmission…

The ODBII code U1785 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in the data transmission or connection. The severity of ODBII code U1785 is typically considered moderate to high. Common Causes For: U1784 refers to a communication issue related to the…

The ODBII code U1786 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in data transmission or connectivity. The severity of ODBII code U1786 is generally considered moderate to high. Common Causes For: U1785 refers to a communication issue related to the transmission…