P0558

Brake Booster Pressure Sensor Circuit High

Q: Is it safe to drive with P0558?

Your brakes still work, but this can affect power assist and stability systems, so drive gently, test the pedal, and have it diagnosed soon — don't ignore a brake-related warning.

Q: Can I just clear P0558?

It will come back until the sensor circuit fault is repaired. Because it involves the brake system, it's worth fixing rather than clearing.

Brake booster / brakes Generic OBD-II High

What it means

P0558 means the brake booster pressure (vacuum) sensor is reporting a voltage higher than its normal range, so the ECM flags the circuit as faulty. It's an electrical fault in the sensor or its wiring rather than a brake failure — your brakes still work, though power assist and stability systems may behave differently.

High

Can I keep driving? Drivable, but treat with care — your brakes still work hydraulically, though power assist and stability systems may behave differently, so test the pedal and get it checked.

Real-world scan data

Seen in

230

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
ABS or electronic stability control warning lights illuminated
Harder brake pedal or increased pedal effort in some vehicles
Brake assist system warning or reduced power assist

Common causes

Most likely first

Faulty brake booster pressure (vacuum) sensorLikely
Open circuit or short to voltage in the sensor's signal wiringCommon
Poor or corroded electrical connection at the sensorCommon
Faulty brake booster control moduleLess often
Faulty engine control module (ECM)Less often

How to diagnose & fix

Work through it in order

Inspect the sensor connector and wiring for damage, corrosion, or a short to voltage.
Check the sensor's signal voltage against spec with a scan tool; a stuck-high reading points to the sensor or wiring.
Test and replace the brake booster pressure sensor if it reads out of range.
If wiring and sensor are good, test the brake booster control module and ECM, replacing only if confirmed faulty.

FAQ

Quick answers

Is it safe to drive with P0558?+

Your brakes still work, but this can affect power assist and stability systems, so drive gently, test the pedal, and have it diagnosed soon — don't ignore a brake-related warning.

Can I just clear P0558?+

It will come back until the sensor circuit fault is repaired. Because it involves the brake system, it's worth fixing rather than clearing.

Read & clear P0558 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX