Q: Q: Speedometer doesn't work.

asked by on

2003 santa fe gls 2.7 speedometer doesn't work. Replaced input and output speed sensors, VSS, & cluster. Checked blue, green, and black wires to VSS. All are functional. Even ran a direct ground to black just in case. Checked all fuses under hood and in dash under drivers side. Cruise also does not work.

My car has 117000 miles.
My car has an automatic transmission.

The signal output of the vehicle speed sensor should be confirmed on a scan tool. There is a plastic gear on the end of the sensor (sold separate from the sensor) and that plastic gear is turned by the transmission. Sometimes the plastic gear disintegrates and of course if that happens there will be no sensor output and no speedometer reading. If you check the output, and waveform, of the speed sensor on a scan tool and it is normal (there is a stepped waveform that increases in frequency with vehicle speed), then the next step is to trace that output signal to find the interruption (or faulty module). The cruise control system relies on the VSS as well so the two issues (no speed read out and no cruise) could have a common cause. If you want a prompt resolution of this, the recommended service to request is an electrical component diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Speedometer doesn't work.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: HI I own hyundai i30 2012 model my eps light is flashing, what does this mean?

The EPS (Electronic Power Steering) light flashing indicates that you may have a power steering malfunction. This light normally comes on for a brief moment when the car is first started and then should turn off. When this happens you...

Q: Car shuts off after idling for 15min

Hi there: The fact you noticed milky oil is an instant indicator that you've got a major mechanical issue where coolant or water is entering oil galleys. Even if the engine doesn't overheat, you still might have a crack in...

Q: Won't start after putting in new alternator, battery, starter and fuses.

Hi there. Check the battery cables and make sure that they are hooked up properly. Look to see if there is an issue with a loose ground on the fuse box. When smoke comes from the battery cables, that usually...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...