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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