P051B

Crankcase Pressure Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check engine light comes on
Reduced engine power

Causes

Crankcase pressure sensor malfunction
Open or short circuit in wiring harness
Poor contact in the sensor connector
Problems with the engine control unit (ECU)

How to Fix

Check the integrity of the sensor wiring harness
Check sensor connectors for corrosion or damage.
Check the functionality of the crankcase pressure sensor
If necessary, replace the sensor or repair the wiring harness

Related codes

P051A P051C P0520