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In a Mercedes, error code 1425 appears when the ABS module receives a speed message that seems improbable. Possible causes include a module malfunction, variations in tire size, or wiring issues, but a likely culprit would be a malfunctioning wheel speed sensor. This sensor, also known as a vehicle speed sensor (VSS), acts as a tachometer to measure the speed of the wheels by detecting their rotations. Typically, it comprises a toothed ring and a pickup device. If the PCM does not receive a valid speed signal from these sensors, it cannot effectively manage gear shifts in the transmission.
Can you tell me which specific speed sensor it is?
In a Mercedes, when you see Code 1425, it indicates an issue with the wheel speed sensor.
Issue with the sensor that measures wheel speed