Auto Systems and Repair: PCV Valve

Symptoms of Wear or Failure

  • Engine may run rough or stall
  • Excessive oil consumption
  • Engine oil leak
  • High emission levels
  • Check Engine Light may illuminate

Related Repair Advice

  • The PCV valve should be replaced every 30,000 to 50,000 miles
  • The engine should be tested to verify normal operation after a PCV repair. This is to ensure that no additional problems exist that may have contributed to PCV failure.
  • A plugged PCV system can cause engine oil leaks. It's important that the shop checks and eliminates any issues with the PCV system while repairing engine oil leaks.