The Verizon Hum OBD2 device, designed to provide vehicle diagnostics and assistance, has been linked to serious transmission control module (TCM) problems in Nissan and Ford vehicles. This article explores the issue of the Hum OBD2 potentially not sending data correctly and its impact on these vehicles.
Understanding the Problem: Hum OBD2 and TCM Failure
Reports from transmission shops and automotive experts, including Gary Carter and Pat from Level 10, indicate a correlation between the use of the Verizon Hum and TCM failures in Nissan and Ford vehicles. The TCM, a critical component responsible for managing the transmission’s operation, is highly sensitive to electrical fluctuations. It’s suspected that the Hum OBD2 device may be introducing voltage surges or data interruptions that can damage the TCM.
Jasper Transmissions, a leading transmission remanufacturer, has reportedly invested significant resources in addressing this issue. They’ve established a static-free bench area for TCM repairs, highlighting the sensitivity of these modules to electrical interference. Technicians working on these TCMs are required to wear grounding bracelets and utilize a grounded bench system to prevent further damage.
Evidence and Observations: Hum OBD2 Interference
Numerous anecdotal accounts support the claim of Hum OBD2 interference. Vehicle owners have reported experiencing various error codes, including ABS, traction control, pre-collision assist, and engine performance reduction, while the Hum device was plugged in. Upon removing the Hum, these error codes often disappear, and the vehicles return to normal operation. This suggests that the Hum may be disrupting the data flow within the vehicle’s onboard computer systems.
Further investigation reveals that other OBD2 plugins can also potentially interrupt data flow to the vehicle’s control modules. This interference can manifest as short circuits, incorrect data transmission, or voltage fluctuations, all of which can lead to TCM damage in susceptible vehicles like Nissans and Fords.
The Hum, and other OBD2 plugins, collect data from the vehicle’s engine management system (EMS). This constant data collection may be creating a parasitic load on the EMS, contributing to the electrical instability and potential for TCM damage. Additionally, delays in data transmission caused by the plugin can disrupt the delicate timing of the EMS, further exacerbating the problem.
Conclusion: Addressing the Hum OBD2 Issue
While a definitive causal link between the Verizon Hum and TCM failure requires further investigation, the evidence strongly suggests a correlation. If you’re experiencing unexplained transmission problems or error codes in your Nissan or Ford vehicle and are using a Verizon Hum, it’s recommended to remove the device immediately. Contact Verizon to report the issue and inquire about potential solutions or compensation for damages. Consider exploring alternative diagnostic tools that minimize the risk of electrical interference with sensitive vehicle systems. For further diagnosis and repair, consult a qualified automotive technician specializing in transmission issues.
