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P0501

P0501 - Vehicle Speed Sensor 'A' Range/Performance

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P0501 Comments |  Add Comment
Possible causes
- Faulty Vehicle Speed Sensor
- Vehicle speed sensor harness or connectors is open or shorted
- Vehicle speed sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
Help with Possible causes What does this mean?
When is the code detected?
The signal sent by the vehicle speed sensor to ECM is out of range.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Speedometer may not work properly
- Transmission shifting problem
P0501 Description

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the Engine Control Module (ECM). The ECM determines the vehicle speed based on the frequency of these pulse signals.

OBDII Code P0501 - Vehicle Speed Sensor 'A' Range/Performance
P0501 Information for specific makes
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