C0269

Brake Vacuum Sensor

Moderate severity

The brake control module has detected an implausible signal from the vacuum sensor on the brake booster. Modern systems monitor booster vacuum to ensure brake assist is available, especially with stop-start engines and electric vacuum pumps.

Common causes

Vacuum sensor failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $110-880
Leak in vacuum supply line
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $110-880
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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 C0269 mean?

C0269 means "Brake Vacuum Sensor". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0269?

vacuum sensor failed; leak in vacuum supply line; vacuum pump weak — 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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