JScan, a popular OBD2 diagnostic and programming application, may present challenges when making certain modifications to a Jeep Patriot, potentially affecting Jeep Compass models as well. Experiences indicate issues can arise when altering tire size or Daytime Running Lights (DRLs) settings.
Modifying tire size within the JScan app on a Jeep Patriot resulted in an engine light and limp mode, triggered by a P0610 TRANS CONTROL code. Clearing the code required disconnecting the battery, draining the system, and resetting the vehicle’s computer. While the P0610 code was successfully cleared using JScan’s advanced scan and code deletion functionality, residual high beam control circuit codes (B1634, B1630, B1638) remained. These codes eventually cleared after driving the vehicle. The JScan developer confirmed potential compatibility issues with tire size adjustments on the Jeep Patriot.
Further experimentation with DRL adjustments, switching from high beam to low beam and sidelights, also resulted in the engine light and limp mode. Attempts to enable HID headlights and other modifications within JScan led to similar issues. The vehicle in question utilizes aftermarket HID projector headlights with relays, potentially contributing to the code generation. The car’s computer may be detecting the altered electrical load from the HID system and triggering fault codes.
Currently, the vehicle operates without limp mode, but retains high and low beam codes (B1633, B1634, B1638). Avoiding tire size and DRL adjustments prevents further issues. The slight speedometer discrepancy due to the increased tire size and the high beams activating with the low beams remain.
Alternative OBD2 software, such as Appcar DiagFCA, might offer a solution. However, it’s uncertain whether similar compatibility problems will occur when attempting tire size or DRL modifications on Jeep Compass or similar models. Further research and testing are recommended before implementing such changes using any OBD2 software. Always exercise caution when modifying vehicle settings with aftermarket software and consult reliable resources or professionals if encountering issues.
