The ODBII code U1815 indicates a communication failure between the Transmission Control Module (TCM) and the Engine Control Module (ECM), suggesting a problem in the data exchange between these two components. The severity of ODBII code U1815 is typically considered moderate to severe. Common Causes For: U1814 U1814: Transmission Control Module Communication Error Faulty wiring…

The ODBII code U1816 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 U1816 is generally considered moderate to high. Common Causes For: U1815 U1815: TCM-ECM Communication Failure Faulty Transmission Control Module (TCM)…

The ODBII code U1817: TCM-ECM Communication Fault indicates a communication issue between the Transmission Control Module (TCM) and the Engine Control Module (ECM), which may affect vehicle performance and transmission operation. The severity of ODBII code U1817 is moderate to severe. Common Causes For: U1816 refers to a communication issue related to the transmission control…

The ODBII code U1818 indicates a communication failure between the Transmission Control Module (TCM) and the Engine Control Module (ECM), suggesting a problem in the data exchange between these two components. The severity of ODBII code U1818: TCM-ECM Communication Failure is typically considered moderate to severe. Common Causes For: U1817 U1817: TCM-ECM Communication Fault Faulty…

The ODBII code U1819 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a possible fault in the data transmission network. The severity of OBDII code U1819 is generally considered moderate to high. Common Causes For: U1818 U1818: TCM-ECM Communication Failure Faulty Transmission Control Module (TCM)…

The ODBII code U1820: Audio System Communication Failure indicates a communication issue between the audio system and other modules in the vehicle, suggesting that the audio system is not properly communicating with the network. The severity of ODBII code U1820 is generally considered moderate. Common Causes For: U1819 refers to a communication issue related to…

The ODBII code U1821 indicates a “Network Communication Line Fault,” which means there is a problem with the communication between modules in the vehicle’s network, potentially due to a wiring issue, a faulty module, or a poor connection. The severity of ODBII code U1821 is moderate. Common Causes For: U1820 U1820: Audio System Communication Failure…

The ODBII code U1822 indicates a communication line fault within the vehicle’s network, suggesting a problem with data transmission between modules or components. The severity of ODBII code **U1822: Communication Line Fault in Vehicle Network** is generally considered moderate to severe. Common Causes For: U1766: Module Communication Failure Faulty wiring or connectors Short circuits in…

The ODBII code U1823 indicates a “Module Communication Failure,” meaning there is a problem with communication between the vehicle’s control modules, often due to a wiring issue, a faulty module, or a network problem. The severity of ODBII code U1823 is moderate. Common Causes For: U1821 U1821: “Network Communication Line Fault” Faulty wiring or connectors…

The ODBII code U1824 indicates a communication failure between modules in a vehicle’s network, suggesting that one or more control modules are unable to communicate with each other properly. The severity of ODBII code U1824 is moderate. Common Causes For: U1823 U1823: “Module Communication Failure” Faulty wiring or connectors Failed control module Corrupted software or…