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P051A Powertrain

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.

Affected components

  • Crankcase pressure sensor a

Common causes

  • High likelihood: Open in sensor or wiring

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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