Fault, Fault code Possible causes, elimination, notes · Fault code 4

911 Carrera (996) HBA diagnosis Fault, Fault code Possible causes, elimination, notes Fault code 4 Axle position sensor I rear This fault is stored in the followingcases: (angle sensor for HBA) 1. Short circuit to voltage/ground or open circuit in the supply leads betweenthe control module and angle sensor for HBA,rear 2. The sensor linkage is disengagedor faulty 3. Anglesensorfor HBAis faulty 4. Thecontrolmoduleis faulty Elimination: -Visually inspect the sensor linkage and check the plastic holder of the sensor. Switch off ignition Pull plug off the angle sensor for HBA, rear Switchignitionon Measure voltage between terminal 5 of the sensor plug and ground Voltmeter display approx. 5 V Measurevoltage betweenterminal 5 and terminal 1 of the sensor plug Voltmeter display approx. 5 V In the PST2menu item Actual values, select Sensor voltage,spring travel 2 (rear) Connecta jumper to terminals 4 and 5 of the sensor plug PST2 display approx.5 V If no fault is detected in the wires, replace the angle sensor for HBA. 94 -D 17