Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Do not replace a device based only on Diagnostic Trouble Code (DTC) B101D being set in history except for the Inflatable Restraint Sensing and Diagnostic Module (SDM) and the Passenger Presence Module. If the DTC B101D is set as current, replace the appropriate device.
B101D:F0 set in the BCM after a dead battery event. The rare condition that sets B101D:F0 is an extremely dead battery case. It is NOT the cause of the dead battery, but the extremely low voltage is a trigger that causes this DTC to be set. If DTC B101D:F0 is set current in the Body Control Module (BCM), clear the codes. If DTC B101D:F0 clears with no other symptoms, DO NOT replace the BCM.
To diagnose the B101D GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
Internal fault detection is handled inside the device. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will be set when the device has detected an internal malfunction. This DTC will affect only the device to which the code is set. Do not replace a device based only on DTC B101D being set in history except for the Inflatable Restraint Sensing and Diagnostic Module (SDM) and the Passenger Presence Module. If the DTC B101D is set as current, replace the appropriate device.
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