Subaru WRX speedometer and gear selection issue on Subaru WRX

Some Subaru WRX owners report experiencing speedometer and gear selection issues, which can stem from several factors. These owners have noted that a malfunctioning Vehicle Speed Sensor (VSS) may lead to inaccurate speed readings, as the VSS is crucial for relaying data to the Engine Control Unit (ECU). Additionally, problems with the speedometer gear within the transmission can arise, and such issues may not be covered under warranty. When the vehicle fails to move in drive, some owners recommend checking the transmission fluid, as problems with the fluid, shift linkage, or torque converter can contribute to this issue. Furthermore, some owners suggest inspecting internal gear components by removing the sensor and rotating the input shaft to determine if there is an internal malfunction. If the VSS is faulty, it may require replacement to resolve speedometer problems. Addressing these concerns promptly is essential for maintaining the vehicle's performance and safety.