Experiencing issues with your 2011 Jeep Patriot’s OBD2 system can be frustrating. Many owners turn to OBD2 apps like JScan for diagnostics and customization. However, user experiences suggest that JScan might not be the ideal solution for certain modifications on the 2011 Jeep Patriot, particularly concerning tire size adjustments and Daytime Running Lights (DRLs).
One Jeep Patriot owner reported encountering significant problems after using the JScan app to alter tire size and DRL settings. The day following these changes, an engine light illuminated, and the vehicle entered limp mode. The error code flagged was P0610 TRANS CONTROL, indicating a transmission control system malfunction.
To resolve this, the owner detailed a manual reset procedure. This involved disconnecting the battery, draining the electrical circuit by connecting the disconnected battery cables, and leaving them separated for about half an hour. Upon reconnection, a series of ignition switch cycles and engine idling allowed the system to relearn its settings. Subsequently, using the JScan app again to revert all settings to their original configurations and clearing the error codes seemed to resolve the limp mode and engine light issue. Initially, after clearing codes, only the P0610 code disappeared, while B1634, B1630, and B1638 (HIGH BEAM CONTROL CIRCUIT FRONT CONTROL) codes remained active. However, after driving the vehicle, even the engine light extinguished, and normal operation resumed, albeit with persistent headlight-related codes.
Contacting the JScan manufacturer provided some clarity. They reportedly acknowledged that the JScan app may not handle tire size changes effectively on the Jeep Patriot. This suggests a potential compatibility issue between the app and the 2011 Jeep Patriot’s OBD2 system, specifically when it comes to these particular modifications.
Despite resolving the limp mode, the owner’s 2011 Jeep Patriot continues to display B1633, B1634, and B1638 codes, all related to high and low beam headlight circuits. These codes appear to be triggered by the vehicle’s system sensing changes, possibly due to an aftermarket HID projector headlight setup with relays. The owner suspects that the vehicle’s computer is detecting the altered electrical load from the HID system, even when DRL settings are not actively being changed via JScan. Attempts to activate HIDs and other settings within JScan also resulted in the reappearance of the engine light and limp mode, reinforcing the app’s limitations for this vehicle in these areas.
The user is now considering exploring the Appcar Diagfca app as an alternative OBD2 tool for their 2011 Jeep Patriot. A key question remains: will Appcar Diagfca offer better compatibility for tire size and DRL adjustments, or will similar issues arise due to the inherent sensitivities of the 2011 Jeep Patriot’s OBD2 system to these types of modifications, especially with aftermarket lighting systems? Further investigation and user experiences with Appcar Diagfca on the 2011 Jeep Patriot would be valuable in determining a more reliable OBD2 modification solution.
