Q: ABS light, 2002 Toyota 4 Runner

asked by on October 24, 2016

When driving, there is a pulsating, hissing noise coming from underneath the steering column. After a while the ABS, E-brake, VSC and Trac lights come on, accompanied by a loud beeping noise. This last for a minute or so before the lights go off, and both the beeping and hissing noise stop. It has done this twice in the last two days. I had the brake rotors and pads replaced, but I'm guessing this is more of an electrical or ABS issue.

My car has 199300 miles.
My car has an automatic transmission.

Hi there. What you may be experiencing is a failing one way air valve or internal fault of the brake booster. The hissing is the result of the failed internal diaphragm while the pulsating may be caused by fluttering of the one way air valve. The lights illuminate due to the ABS computer seeing the brake demand from the pedal and low pressure from the master cylinder. This is a serious concern as the brake system could fail without warning. I strongly suggest having a qualified technician perform an inspection as soon as possible to determine the exact failure. YourMechanic has several technicians available that can assist you with a hissing noise while braking inspection and provide an estimate and direction of repair.

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

codes p0174, p0302, and p2A03 read on code reader.

Hi there. What is happening is the codes are reading for a misfire on cylinder number 2 and the system is too lean on bank 2. Check the spark plugs and the fuel injector on cylinder 2 to see if...

How much will it cost to have a shop replace the freeze plugs in between the trans and engine block on my 2002 dodge ram 1500 4.7L

The labor to just remove and install the transmission is 4.5 hours and then add one hours labor to do the one freeze plug on back of motor and an additional 1/2 hour for each additional freeze plug. You may...

My security light is on and my 2005 Chevy equinox will not start..what's going on

Check to see if your battery voltage is low, that is below 12.6 volts. If the battery is discharged or faulty, the immobilizer system might set. If battery voltage is normal and you suspect the immobilizer system is on, to...

Related articles

How Long Do Brake Rotors Last?
Brake rotors, sometimes called discs, are an important component of the braking system on any vehicle. The brake rotors are the part of...
How Long Do Brake Pads Last?
How How long can brake pads last? Brake pads last from 25,000 miles to 70,000 miles depending on their design and material. Brake pads are part of the braking system of every vehicle. Designed to handle high friction, when the...
Top 10 Brake System Issues Every Car Owner Needs To Know
Every driver should know how to check for problems with car brakes. Warped rotors, leaky brake hoses, and squeaky brakes are among the most common.