Home › Ford › 2023 › Explorer Timberline › Repair and Diagnosis › Brakes › Brakes Control Systems › Abs Guided Routine Testing - DTC Index, Symptom Chart - Anti-Lock Brake System (Abs) And Stability Control › DTC/Symptom Selection › DTC Index › PCM - Powertrain Control Module › DTC U034B: Software Incompatibility with Brake Booster Control › Possible Causes