P051A
Crankcase Pressure Sensor A Circuit
A general circuit fault is detected on the crankcase pressure sensor A - typically used to monitor PCV operation and detect a clogged separator or disconnected hose.
A general circuit fault is detected on the crankcase pressure sensor A - typically used to monitor PCV operation and detect a clogged separator or disconnected hose.
Common causes
- high
Open in sensor or wiring
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-310
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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
See related trouble codes
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Frequently asked questions
What does P051A mean?
P051A means "Crankcase Pressure Sensor A Circuit". It is a generic OBD-II code that points to a fault in the vehicle speed, idle control, auxiliary inputs.
What are the most common causes of P051A?
open in sensor or wiring — 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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