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Air Pump

By Bret Bodas, April 15, 2008

The air pump provides fresh air to various locations in the exhaust system, which helps complete the combustion of harmful exhaust gases. 

Symptoms of a Bad or Failing Air Pump

  • Check Engine Light may illuminate
  • Vehicle may fail emissions inspection
  • Abnormal noise while air pump is operating

Air Pump Related Repair Advice

  • An air injection system trouble code isn't always triggered by a defective air pump. It can also be triggered by a restricted passage or air pipe, a defective check valve, a defective air pump relay, or a wiring problem.
  • On older vehicles, the air pump is typically belt driven. On newer vehicles, an electric pump is used and only operated when necessary.

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