Drive with caution — fix soon.
This code means the vehicle speed sensor is sending a signal, but it's erratic or doesn't match the expected range for how the car is actually moving. It often points to a worn or contaminated speed sensor, a damaged sensor wheel or ring, or wiring problems. It's usually a straightforward repair involving sensor replacement or cleaning and wiring checks.
$110 – $400
Varies by vehicle and root cause.
Usually yes, but be cautious because your speedometer may be unreliable. Cruise control may not work and shifting can feel uneven. It generally won't leave you stranded, but get it looked at soon for safety.
Expect roughly $110 to $400. Cleaning or replacing the speed sensor is the most common and affordable fix, while a damaged tone ring or wiring repair costs more. A scan helps confirm the exact cause first.
It's moderately serious. The car still drives, but an erratic speed signal affects the speedometer, cruise control, and transmission behavior, which has safety implications. It's best addressed before it gets worse.
P0501 means the sensor is producing a signal but it's out of the expected range or erratic, rather than missing entirely. That often points to a contaminated sensor or a damaged tone ring rather than a completely dead circuit.