Skip the auto shop - Our mechanics make house calls

Q: Instrument cluster on the dash, tachometer bounces, speedometer at 0. Unplugged ABS module, speedometer at 0. doesn't shift gears

asked by on

My dash has just recently started going haywire. My Tachometer will bounce up and down along with the temperature gauge. My Emergency brake light stays on and my Speedometer will sit at zero regardless of what speed I am going. The ABS light remains on as well. The AC does not blow cold air when this happens. I read that it could be the ABS module about to go out and to try driving around with it unplugged to see if the dash situation persists. I tried that and when I do, speedometer still sits at 0 and my car does not shift gears while in drive. When i re-plug the ABS module back in, it drives like normal and the dash works like its supposed to but only for a short time before it starts doing what it did before, but during the time the dash is going crazy with the ABS module still plugged in, the car drives normally. I took it to Auto zone to get diagnostics run on it. The only error it could find suggested that my speed sensor encountered an intermittent problem. What could it be?

My car has 114000 miles.
My car has an automatic transmission.

A: Hello. There are a lot of possible issues t...

Hello. There are a lot of possible issues that can cause this. Most of the time this is either due to a short in the ABS module or it may just be a voltage issue. I would usually start by making sure that the battery and alternator are in good shape. If they are good, then I check the connections at the battery and the ground connections. Any of these will cause this issue if they are interrupting the voltage supply. If those are all fine, then it will need a new ABS module. I recommend having another expert provide an inspection for the car. A qualified professional from YourMechanic can inspect the relevant electrical systems in order to diagnose the problem and advise you on correct 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: Need cv axel half shafts replaced.

If a mechanic shows up with an air tool to apply torque to a CV axle nut, run for the exits. The ONLY tool that can be used to tighten that nut is a carefully calibrated torque wrench, preferably one...

Q: How do I change the radio station in a 2012 Ford F-150?

Playing music while driving is a big part of the driving experience and your truck is equipped with a radio that allows to you play various kinds of music through different stations. To change the Radio Station. Use the...

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

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...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.