Skip the auto shop - Our mechanics make house calls

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.

A: Hello there, you are correct. Both of the c...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Thunking noise in rear of the car.

Hi there, thanks for writing in. This thunking noise is a common problem when U-joints (driveshaft) are worn out. I would recommend having them inspected to be sure they do not have too much play in them. When there is...

Q: How do I mute a phone call in a 2012 Hyundai Elantra?

When making a phone call through the Bluetooth system, you can mute your mic. When muted, the person you are speaking to will not be able to hear you, but you will still be able to hear them. To mute...

Q: p0720 code will not stay gone

Hello. If the vehicle speed sensor has been replaced then the wiring to the sensor must be tested. If there is high resistance or any breaks in the wire then this will occur. I have also seen the signal gear...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.