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・Save up to 30%

Get a quote

What others are asking

Q: Ticking sounds coming from the hood and weird noise of the tires

A ticking that changes frequency in line with engine RPM can be an indication of a collapsed lifter. Replacing a lifter requires a good amount of the upper engine to be taken apart to swap it out. It is hard...

Q: No power to dash when you turn key but will crank.

Check for "codes" (PCM, ECU, BCM) to see if any read out. If no codes, this is a switch (ignition), fuse, relay, and/or wiring problem which has to be tracked down systematically.

Q: Speedometer broken in 2005 Jeep Liberty

Hello. The most common cause of a speedometer not working on your Jeep is a bad vehicle speed sensor. It can always be a gauge or wiring issue, but those are not as common. With a computer scan tool, a...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...