2007 Dodge Ram 1500 4.7L Stalls with U0141 Code: BCM Not Communicating with FCM
My 2007 Dodge Ram 1500 with a 4.7L engine suddenly stopped starting. When I turn the key, the truck doesn't attempt to crank at all. The only diagnostic code detected is U0141 — indicating that the Body Control Module (BCM) is not communicating with the Fuel Control Module (FCM). This issue appeared overnight; the truck was previously running fine. I'm concerned this might be a relatively affordable fix rather than requiring a full TIPM replacement. What are the most effective troubleshooting steps for this U0141 fault in a 2007 Dodge Ram 1500? Any guidance on how to diagnose or resolve BCM-FCM communication failure would be greatly appreciated.
Initial troubleshooting steps to consider: - Check if any modifications were made, such as ECU chips, programmers, or aftermarket devices — ensure the vehicle is stock. - Verify all relevant fuses are intact, especially those related to the Body Control Module (BCM) and ignition system. After clearing the U0141 code, attempt to start the truck. Ensure no external devices are connected to the ALDL (Automotive Local Data Link). Common fault codes associated with this issue: - FUSED B (+) CIRCUITS OPEN - FUSED IGNITION SWITCH OUTPUT CIRCUITS OPEN - GROUND CIRCUITS OPEN - CAN C DIAGNOSTIC CIRCUITS OPEN - CAN C DIAGNOSTIC CIRCUITS SHORTED TO GROUND - CAN C DIAGNOSTIC CIRCUITS SHORTED TOGETHER - TOTALLY INTEGRATED POWER MODULE (TIPM) failure Next, use an OBD2 scanner to perform network diagnostics: 1. Turn the ignition key to ON. 2. Connect the scan tool and select 'Network Diagnostics'. 3. Confirm that the TIPM is active on the CAN bus. Note: This issue may require professional diagnosis — I'm not experienced in DIY troubleshooting for this specific fault.