Skip the auto shop - Our mechanics make house calls

Q: ABS and brake light is on

asked by on

What is the possible problem and cost

My car has 148632 miles.
My car has an automatic transmission.

A: If the ABS warning light is on, that means ...

If the ABS warning light is on, that means that there are downloadable ABS diagnostic trouble codes, much like the codes you would download if you have a Check Engine Light diagnostic. The ABS trouble codes will give a general indication of "where" the trouble lies but as far as what part(s), if any, that would need to be replaced, that would depend on what the component level diagnostics and testing reveals. So, just to give you a for instance, you could have a trouble code that basically states: "lost signal from LF wheel sensor" or "LF wheel sensor out of range". Those codes could mean the left front wheel sensor is bad, in which case you need a wheel sensor but the codes could alternatively mean that the harness connection (terminals) between the sensor and the vehicle wiring are loose, corroded, or damaged, that is the sensor is OK, there just is a poor, or no, connection. So, to answer your question as to cost, it just depends on exactly why the code(s) have set and that can only be determined as the individual component(s) referred to in the codes are individually tested. In the just cited example, the sensor is testable because the sensor creates an output that can be measured on a scope. If the sensor tests OK, then the wiring is looked at and so forth, on up to the ABS control unit. One of the biggest misunderstandings of these modern day "diagnostic trouble codes" is that you can read a code, identify a part and just go out buy the part and replace it. You can't unless you don't mind wasting money. All parts, or systems, "suspected" to be faulty, by virtue of a code "referral", have to be INDIVIDUALLY tested and if you have chosen a good mechanic, the mechanic will tell you conclusively and authoritatively which part is bad, and why, because he or she will have conducted an actual diagnostic. YourMechanic can dispatch a professional to interpret the ABS Codes that have set and begin the process of tracking down the fault to get to the root cause. At that point, of course, you will get an estimate of the exact cost to repair the issue. Hope we can help you get your issue resolved and if you have additional concerns relative to this, by all means let us know.

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: Cost for transmission replacement

Re-manufactured transmissions for this vehicle cost in the neighborhood of $3,000, not including installation. Prior to deciding to re-build the car's existing transmission (a good, lower cost option) or replacing it with a re-manufactured unit (a higher cost option), the...

Q: Abs lights is on

In order to find what ABS sensor is causing the ABS light to be on you will need a mechanic like one from YourMechanic come to you and scan the ABS system computer to retrieve the stored codes and even...

Q: Car stalling at random, could be an electrical problem?

Generally, when the car is running consistently and on all cylinders, when stalling it is often times a fuel supply issue (or in some cases indirectly related to electrical - i.e. bad connection or pulse to the fuel injectors). I...

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 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.