The ODBII code U1805 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 U1805 is moderate to severe. Common Causes For: U1804 U1804: Data Bus Communication Fault Faulty Transmission Control Module…

The ODBII code U1806 indicates a communication issue where the vehicle’s network is not receiving an acknowledgment from a module that is expected to respond, specifically related to the SCP (J1850) protocol. The severity of OBDII code U1806 is moderate. Common Causes For: U1805 U1805: Transmission Control Module Communication Error Faulty communication between modules Damaged…

The ODBII code U1807 indicates a data bus communication fault, meaning there is a problem with the communication between the vehicle’s control modules over the data bus network. The severity of ODBII code U1807 is moderate. Common Causes For: U1806 U1806: Data Bus Communication Fault Faulty wiring or connectors in the data bus system Malfunctioning…

The ODBII code U1808: Data Bus Communication Fault indicates a problem with communication between the vehicle’s control modules, often due to a wiring issue, a faulty module, or a problem with the data bus itself. The severity of ODBII code U1808 is moderate. Common Causes For: U1807 U1807: Data Bus Communication Fault Faulty wiring or…

The ODBII code U1809 indicates a data bus communication fault, meaning there is a problem with the communication between the vehicle’s control modules over the data bus network. The severity of ODBII code U1809 is moderate. Common Causes For: U1808 U1808: Data Bus Communication Fault Faulty wiring or connectors in the data bus system Malfunctioning…

The ODBII code U1810 indicates a communication fault between the Transmission Control Module (TCM) and the Engine Control Module (ECM), suggesting a failure in data exchange between these two components. The severity of ODBII code U1810 is generally considered moderate to severe. Common Causes For: U1809 U1809: Data Bus Communication Fault Faulty wiring or connectors…

The ODBII code U1811 indicates a communication issue between the transmission control module (TCM) and the engine control module (ECM), suggesting a failure in data exchange between these two components. The severity of ODBII code U1811 is generally considered moderate to high. Common Causes For: U1810 U1810: TCM-ECM Communication Fault Faulty wiring or connectors between…

The ODBII code U1812 indicates a communication issue between the Transmission Control Module (TCM) and the Engine Control Module (ECM), suggesting a failure in data exchange between these two components. The severity of ODBII code U1812 is typically moderate to high. Common Causes For: U1811 refers to a communication issue between the transmission control module…

The ODBII code U1813 indicates a communication fault between the Transmission Control Module (TCM) and the Engine Control Module (ECM), suggesting a failure in data exchange between these two components. The severity of ODBII code U1813 is moderate to severe. Common Causes For: U1812 refers to a communication issue between the transmission control module (TCM)…

The ODBII code U1814 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 U1814 is moderate. Common Causes For: U1813 U1813: TCM-ECM Communication Fault Faulty Transmission Control Module (TCM) Damaged wiring…