Q: Q: Speedometer not working

asked by on

I have two codes popping up from the engine light. P0720 and P1529. Is this a serious problem or is it just the speedometer? I think I just need a speed sensor replacement but I would like to make sure. I stopped driving it in fear of more damage. When I try to accelerate, it gave me a thud after slowing down and it doesn't make a sound when I stop at a stop light. It takes a long time to move and speed up.

My car has 206000 miles.
My car has an automatic transmission.

Hello there, you are correct. Both of the codes on your 2001 Hyundai Elantra can relate to the speedometer. The P0720 code is for output speed sensor circuit fault, this can be caused by a faulty speed sensor, a wiring harness fault, or a failing speedometer. The P1529 code is more general and refers to a transmission control module fault present. Your vehicle will still need to be diagnosed to properly determine what the root cause is. A qualified technician, such as one from YourMechanic, will be able to inspect the Check Engine Light so that you can proceed with the proper repairs.

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 not working

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: Truck goes into limp mode while driving

Hello. The P0068 diagnostic trouble code is an indication that there may be an issue with the manifold absolute pressure (MAP) sensor/mass airflow (MAF) sensor. The P0016 diagnostic trouble code is an indication that there may be an issue with...

Q: How do I access the average fuel economy feature?

The average fuel economy feature tells you the average MPG that your vehicle has achieved since the last time the system was reset. To view the average fuel economy, press the Trip button on the steering wheel until the feature...

Q: Codes P2106 and P0720

Hi, thanks for writing in. Code P0720 is for the output speed sensor for the transmission, and code P2016 is for the throttle control actuator in failure mode and may be due to the transmission codes. The system will need...

Related articles

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...
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...
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...