Skip the auto shop - Our mechanics make house calls

Q: My car is still acting up and the speedometer and odometer is not working.

asked by on

So before my car had the codes p0720 and p1529. I got both my input and output speed sensors replaced hoping it will fix the problem but it did not help. My car is still decelerating and going into failsafe mode when I try to reach 45mph and the engine light is coming on and off. I took it autozone and it just has the code p7020 but I just fixed it. The man at autozone told me to put more miles on it to erase the code from the computer. How am I supposed to do that if my speedometer and odometer isn't working? What should I do now?

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

Hi there. First remove the battery cables both positive and ground. Go in the cab and operate everything, even though there is no power. After 12 minutes put the battery cables back on. This will drain all power to the vehicle and reset the computer. Now you can drive the vehicle around to relearn the computer. If he speedometer still does not work, then the instrument cluster will need checked or replaced. If you need further assistance with your speed sensor not working and the computer putting the vehicle into limp mode, then seek out a professional, such as one from Your Mechanic, to help you.

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!
  • Home
  • Questions
  • My car is still acting up and the speedometer and odometer is 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: AC, speedometer, and windows not working

Hello. Depending on how and when these items began to fail will make a difference as to what is going on. If they all occurred at the same time, then I would suspect an issue with the fuse box. It...

Q: How do you use the trip A/B function in the message center?

The trip A/B function in your car’s message center is the same thing as the dual trip odometers on a model without the message center. These are separate odometers designed to let you track the mileage and the time on...

Q: car turning off while driving but starts right back up

Most commonly when the car stalls while driving, but starts right up after, the cause is an intermittently failing crankshaft position sensor or camshaft position sensor. The first step to diagnosing this problem however, would be to scan the engine...

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...
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...
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.