Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0558 OBD-II Trouble Code: Brake Booster Pressure Sensor Circuit High

P0558 OBD-II Trouble Code: Brake Booster Pressure Sensor Circuit High

diagnostic check engine light

A P0558 trouble code is related to a vehicle’s brake booster pressure sensor and its signal being sent to the engine computer.

What the P0558 code means

P0558 is an OBD-II generic code for a voltage problem with the brake booster pressure sensor in that the signal being sent to the engine computer during braking is too high for the manufacturer’s parameters. This will make the computer think pressure is too high, sometime resulting in a firm brake pedal.

What causes the P0558 code?

The most common causes for a P0558 are:

What are the symptoms of the P0558 code?

Symptoms will vary from a simple check engine light, to a firm brake pedal that’s difficult to depress.

How does a mechanic diagnose the P0558 code?

Your mechanic will first visually inspect the brake booster, looking for any damaged wiring, hoses, electrical connectors, or low fluid levels. They will conduct a basic vacuum leak test of the hoses to determine if a simple hose replacement is in order. If anything seems out of place, parts will be replaced or repaired. However, if the visual inspection and vacuum leak test checks out, your mechanic will test the resistance of the brake booster pressure sensor before replacing it.

Common mistakes when diagnosing the P0558 code

Some P0558 codes can be caused by low fluid levels, especially if the vehicle in question uses a hydraulic brake booster feed by the power steering pump. Overlooking this may not cause the code to go away.

How serious is the P0558 code?

Most P0558 codes won’t cause any serious issues other than a check engine light, but in some cases, hard brake pedals will result.

What repairs can fix the P0558 code?

The most common repairs for a P0558 are as follows:

Additional comments for consideration regarding the P0558 code

Some P0558 codes are intermittent and can be cleared without a return, so it’s wise to clear the code and reset the engine computer first before parts are replaced.

Need help with a P0558 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: Why do I have a p0016 trouble code?

The cause for a p0016 trouble code could be normally be tracked to one of two areas. The code is set when the computer does not see synchronized information being received from the cam and crank sensors. It will be...

Q: OBD support

Hey there. If you have the OBD-2 connector under the dash directly under the steering column, then the ELM327 will work to scan the vehicle after you download the app. I can tell you that this adapter is very cheaply...

Q: P2006 code - intake runner stuck closed

When you got a 1.6 volt reading from the test you did, this is not a normal test done for this code. Only a proper pinpoint done by a manufacturer approved test procedure would be able to diagnose the system...