#speedometer
4 posts in Car Diagnostics blog about "speedometer" — OBD-II diagnostics, DTC codes, repair. ← All posts
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P0720 to P0722: output speed sensor circuit and no signal
The output sensor feeds the speedometer, the cruise control, the ABS and the gearbox. When it goes quiet, four systems fail at once and none of them are broken.
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Speedometer stopped: sensor, cluster or bus
A dead speedometer takes cruise control, the gearbox and sometimes ABS with it. What else stopped working tells you where the fault is.
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Different wheels and tyres: what it "breaks" in the electronics
Different-sized tyres change more than the look. The speedometer starts lying, ABS calculates the wrong speed, and driver assistance systems get a shifted picture of the world.
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P0500: the vehicle speed sensor — when the speedometer lies, half the car stops working
The speedometer sits at zero, and with it the cruise control, the power steering assist, and the transmission all misbehave. Why one speed signal is needed by almost every module at once.