Q: Speed sensor passive

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Doesn't change on automatic
My car has an automatic transmission.

Hello. If the speed sensor is passive, as in it is not responding then there is likely some sort of issue with the speed sensor or circuit. Common causes are issues with the speed sensor, circuit, or even the computer. It may be possible that the sensor has simply failed and needs to be replaced. Another possibility is an issue with the sensor’s electrical circuit. An issue with the wiring that goes to the sensor, or at the connector itself may be throwing, or cutting off the signal. If the sensor and circuit appear to be okay then it may be possible that the issue is with the computer, perhaps an internal fault. I would recommend testing the speed sensor and circuit to see if it is functioning correctly and going from there. If you need help getting this tested, a certified pro from YourMechanic can inspect the sensor and guide you through this repair.

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