Ford E-350 Super Duty transmission temperature gauge failure with flashing tow haul light on Ford E-350 Super Duty

Some Ford E-350 Super Duty owners report experiencing issues with the transmission temperature gauge, which can jump to extreme levels while the tow haul light flashes, indicating potential transmission problems. These owners have noted that the flashing tow haul light often signals a transmission fault, possibly due to wiring faults or solenoid issues. Many recommend using a high-end scan tool to read Ford transmission codes to accurately diagnose the problem. A common issue reported is a failed transmission oil temperature sensor that may require replacement, along with a malfunctioning transmission temperature sensor, which is frequently encountered. In some cases, owners have observed that the transmission temperature may spike, causing the light to stop blinking temporarily, yet the underlying issue persists. Additionally, if the transmission temperature gauge remains normal during these occurrences, it could suggest a different underlying problem. It is advised that owners seek professional diagnosis and utilize specialized tools for reading transmission codes to effectively identify and resolve these issues.