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: What does the airbag Warning Light mean?

The airbag Warning Light is located on your instrument panel. This light illuminates when your airbag system is not operating properly. If the airbag Warning Light comes on, you should have your vehicle inspected as soon as possible. Tip The...

Q: Car won't start or crank ASD relay making rapid clicking noise when key out of ignition 1999 Dodge Intrepid

Hi there - you have pretty-well identified this problem yourself - well done! Yes, the Automatic Shutdown Relay appears to be sticking in the "power on" position, which is providing a power path to the fuel pump as well as...

Q: while driving at speed above 40mph i feel humming sound from real which die down on appling break.

Thanks for writing in about your Hyundai Santa Fe. From what you've described, it sounds like it may be from the rear wheel bearings. When the rear brakes are applied, the brakes will quiet the noise down. Have a mechanic,...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...