C0273

Brake Booster Pressure Sensor Circuit Malfunction

Moderate severity

The brake control module has detected an out-of-range or implausible signal from the brake booster pressure sensor. Brake assist and electronic boost functions may be limited.

Common causes

Booster pressure sensor failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $170-770
Wiring or connector fault to sensor
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $170-770
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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 C0273 mean?

C0273 means "Brake Booster Pressure Sensor Circuit Malfunction". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0273?

booster pressure sensor failed; wiring or connector fault to sensor — 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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