C0090

Hydraulic Brake Pressure Sensor Circuit

Moderate severity

The brake pressure sensor in the master cylinder or hydraulic block reports an implausible signal or no signal. The fault disables ABS, stability control and brake assist.

Common causes

Pressure sensor element failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $220-990
Sensor wiring fault
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $220-990
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does C0090 mean?

C0090 means "Hydraulic Brake Pressure Sensor Circuit". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0090?

pressure sensor element failed; sensor wiring fault — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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