P1051 – Crankcase Ventilation Fault (BMW)

Description

P1051 BMW indicates a fault in the crankcase ventilation system.

Want to confirm the real cause of this fault code?

A high-quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze-frame information — exactly what you need to verify the root cause of this code with confidence.

View Recommended Scanners

Symptoms

  • Rough idle
  • Oil consumption
  • Hesitation

Causes

  • PCV valve failure
  • Air leak
  • Hose damage

Diagnosis

  • Check PCV valve
  • Inspect hoses
  • Scan DME

Repair

  • Replace PCV valve
  • Repair hoses
  • Fix air leaks