P2B7B

EVAP System Pressure Sensor/Switch C Circuit Range/Performance

Moderate severity

The EVAP pressure sensor/switch C reports a circuit range/performance condition. Tank pressure plausibility for leak detection on this branch is impaired.

Common causes

Sensor zero drifted
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $70-330
Sensor port restricted
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $70-330
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P2B7B.
Unlock causes
Free forever · No credit card

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.

Get the full step-by-step diagnosis

Create a free Wrenchify account to unlock the rest for P2B7B.

Unlock diagnosis

Free forever · No credit card

Related codes

See related trouble codes

Create a free Wrenchify account to unlock the rest for P2B7B.

Unlock related codes

Free forever · No credit card

Frequently asked questions

What does P2B7B mean?

P2B7B means "EVAP System Pressure Sensor/Switch C Circuit Range/Performance". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2B7B?

sensor zero drifted; sensor port restricted; sensor element aged beyond calibration window — 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.

Get the full P2B7B diagnosis for your vehicle

Year, make, model + step-by-step repair help — free plan included.

Diagnose P2B7B