my audi a4 2004 brake lights are on and speedometer not m...

Q: my audi a4 2004 brake lights are on and speedometer not moving intermittently

asked by on October 12, 2017

my audi a4 2004 ABS and Brake warning lights are on and speedometer not moving intermittently

Your ABS brake system and speedometer require a good clean signal from wheel or transmission speed sensors. Since you have ABS and brake lights on means the computer has detected a fault in one of these sensors or system. You will need to have the computer scanned to get the stored codes and then have the codes diagnosed to find out and isolate the cause of your problems.

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

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

Crank no start

There are several possible reasons for a vehicle to crank and not start. A bad fuel pump, clogged fuel filter, faulty injectors, bad ecu, failed ignition coil, or a malfunctioning sensor. It will first be necessary to figure out if...

Need advice on whether or not brake fluid should be replaced on my car

The brake fluid in all cars should be changed to prevent the fluid from turning black and creating sludge buildup in the system. This will also keep the internal system from causing wear on the rubber seals and components. The...

Can my 2003 non-turbo 2.4 L engine be swapped into my 2004 turbo PT Cruiser?

Anything is possible, but it's not a straightforward swap. The powertrain control module (PCM) is different as is the wiring. I'm sure there are other subtle differences as well. You could use the 2003 as donor car and pull everything...

Related articles

How to Buy a Good Quality ABS Control Module
The The ABS (anti-lock brake system) control module, which is also known as an EBM (electronic brake module) or EBCM (electronic brake control module) works almost like an engine control computer. This microprocessor receives input from sensors to prevent wheel...
Symptoms of a Bad or Failing Wheel Speed Sensor
Common signs include the ABS Light coming on, ABS not working properly, and the Traction Control Light staying on.
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...