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What is the reason for the Corolla reporting a crankshaft position A circuit fault?

1 Answers

StellaRose

07/30/25 4:21am

Corolla reporting a crankshaft position A circuit fault may be caused by a damaged vehicle speed sensor or a problem with the vehicle speed signal processing module in the instrument cluster. Below is an introduction to the vehicle speed sensor: Introduction: The vehicle speed sensor is a device used to detect the speed of electronically controlled vehicles. The control computer uses this input signal to control engine idle speed, torque converter lock-up in automatic transmissions, automatic transmission shifting, engine cooling fan operation, cruise control, and other functions. Features: The vehicle speed sensor is usually installed in the drive axle housing or transmission housing. The vehicle speed sensor signal line is typically housed in a shielded jacket to eliminate electromagnetic and radio frequency interference caused by high-voltage ignition wires, car phones, or other electronic devices, ensuring uninterrupted electronic communication and preventing degraded driving performance or other issues.

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