Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Long Does an Air Diverter Valve Last?

How Long Does an Air Diverter Valve Last?

air diverter

The air diverter valve is a part of your air injection system. In practically every modern vehicle, you will find a type of air pump that serves to deliver air to the exhaust stream so that it can be re-burned as part of emissions control. Some vehicles use an air pump check valve, while others use an air diverter valve. They both do the same job, and work in basically the same way. The air diverter valve lets air into the exhaust system, and then closes the system to keep exhaust from escaping.

On a carbureted vehicle, the diverter valve works to prevent backfiring during deceleration. When a carbureted engine decelerates, a great deal of fuel is taken into the exhaust, and if it is not diverted out into the atmosphere, a backfire can occur. Because the air diverter valve is used every time that you drive, it can eventually wear out, and even fail. Usually, it is replaced at the same time as the air pump.

Signs that your air diverter valve needs to be replaced include:

  • Backfiring
  • Sluggish engine
  • Check Engine Light is on
  • Emissions test failed

If your vehicle is displaying emissions problems like those identified above, it could be due to any number of problems, one of which could be the air diverter valve. You should have your emissions system checked out by a qualified mechanic, and if necessary, you should have the air diverter valve replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...

Related questions

Q: Check engine light on and recurring P0455

Hi there. The P0455 code that you are getting in the computer is a different issue than the transmission. Most of the time it is caused by a bad gas cap or a leak in the system. If the gas...

Q: Valve gaskets need replacing.

Hi. Your cooling and oil systems would need to be checked for leaks. These are two separate issues. The cooling system should not be getting low, except for a very small amount over a six to twelve month period. The...

Q: Readiness code for emission

Hello. Since the vehicle sat for that long, you may have to drive it for about 500 miles before it resets. The key is varying your driving. You need to drive it at highway speeds, around town, stop-and-go driving, and...