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.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Do you provide parts when repairing like o2,sensors

Yes, of course, any needed, or desired, repair parts can be made part of any repair order so that you do not have to go through the time and trouble of researching and procuring repair parts. I see you are...

Q: During rain, dashboard lights & radio fade out - 1999 BMW 332is

Probably one or more electrical connections are getting wet when it rains. The wheel speed sensor for example is at wheel level (inside the wheel arch), and catches all sort of road spray. Once you find the problem connectors, spray...

Q: Engine swap from 327 to 1999 Vortec 350?

The engine swap should not be a problem. The problem you are going to have is the two wire harnesses and computers being different as this could make it more difficult to program each computer. You may not be able...

Related articles

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...
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...
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...