No scan tool, including the BlueDriver Bluetooth Professional OBDII scan tool, can directly “clear” Limp Home Mode (LHM). LHM is a protective measure activated by vehicle modules to prevent severe drivetrain damage when unusual operating conditions are detected. This mode can manifest in various ways, from reduced power due to turbo disablement to limitations on engine RPM and transmission operation. Transmission limitations can range from restricted gear selection (Park, 2nd, neutral, reverse) to a complete lockout, preventing any drive engagement.
To exit LHM, the underlying vehicle issue must be resolved. For most engine-related LHM events, normal operation typically resumes after the problem is fixed, even without clearing Diagnostic Trouble Codes (DTCs). However, transmission-related LHM often requires accessing the Transmission Control Module (TCM) with a scan tool to clear specific DTCs. A generic OBDII scan tool, like some versions of the BlueDriver, may not have this capability. A Sprinter-specific or “higher level” scan tool is usually necessary for accessing and clearing TCM DTCs. Clearing DTCs in the Engine Control Module (ECM) or Electronic Control Unit (ECU) alone might not suffice.
It’s crucial to document all DTCs before clearing them, as they provide valuable troubleshooting information. A failing component might trigger a DTC only once, making subsequent diagnosis difficult if the code history is erased. Using a generic OBDII scan tool like a basic BlueDriver to clear codes can further complicate troubleshooting, as it might clear codes it cannot even display. The BlueDriver Bluetooth Professional OBDII Scan Tool, while more advanced than a basic code reader, may still have limitations in accessing manufacturer-specific codes and systems.
If your vehicle is under warranty, avoid clearing any DTC history. Dealerships often rely on this information for warranty repairs, including emissions-related extended warranties. Remember, clearing DTCs with any scan tool, including the BlueDriver, doesn’t constitute a repair. Not all power loss scenarios are LHM related; other mechanical or electrical issues could be at play. A comprehensive diagnostic approach, potentially involving a professional-grade scan tool, is crucial for accurate diagnosis and repair.
Clearing codes with a tool like the BlueDriver can be helpful for resetting monitors after repairs, but professional diagnosis is often necessary for complex issues. The BlueDriver Bluetooth Professional OBDII Scan Tool provides a convenient way to access and clear basic codes, but its limitations regarding manufacturer-specific systems should be considered when dealing with LHM.
