Using a Youtube Elm327 Bluetooth Car Reader Scanner Obd2 Obdii device with the Jscan app on a Jeep Patriot resulted in engine light and limp mode after attempting tire size and Daytime Running Light (DRL) modifications. Adjusting tire size and changing DRLs from high beam to low beam and sidelights triggered a P0610 TRANS CONTROL code, forcing the vehicle into limp mode.
Troubleshooting the P0610 Code and Resulting Issues
Clearing the P0610 code required disconnecting the battery, draining the remaining circuit power, and reconnecting the battery. The engine then needed to relearn its settings by running until the idle stabilized. Using the Jscan app’s “trace and restore settings” feature, all adjustments were reverted to their original values. An advanced scan followed by deleting all error codes via the app eliminated the P0610 code.
However, three new codes related to high beam control (B1634, B1630, and B1638HIGH BEAM CONTROL CIRCUIT FRONT CONTROL) appeared. Driving the vehicle cleared these codes and restored normal operation. The Jscan developer confirmed compatibility issues with tire size changes on the Jeep Patriot.
Remaining Issues and Potential Causes
Despite resolving the limp mode, three codes (B1633, B1634, and B1638) related to high and low beams persist. These issues seem linked to the aftermarket HID projector headlights with relay harnesses. The car’s computer likely detects the altered headlight circuit, triggering the codes. While the vehicle operates normally without further modifications, the speedometer reading is slightly off due to the tire size change, and the high beams activate when switching to low beams.
Other attempted modifications using Jscan, such as enabling HIDS, also resulted in the engine light and limp mode. Exploring alternative OBD2 software like Appcar DiagFCA may be considered, but similar compatibility issues with tire size and DRL changes on the Jeep Patriot are anticipated.
Conclusion
Modifying tire size and DRL settings on a Jeep Patriot using Jscan with a YouTube ELM327 Bluetooth car reader scanner OBD2 OBDII device can lead to significant issues like limp mode and persistent error codes. While troubleshooting steps can resolve the immediate problems, underlying compatibility issues remain. Exercise caution when making such modifications and consider potential compatibility problems with specific vehicle models and OBD2 software.
