What to know about the Air Diverter Valve:
Most vehicles today use some sort of secondary air injection system to help regulate emissions. All use some form of air pump, whether electric or belt driven and all inject air into the exhaust stream to enhance re-burning for emissions control.
Some use an air pump check valve to keep exhaust in the system but permit air to be pumped in, but others use an air diverter valve. This serves the same purpose and works in essentially the same way. The air diverter valve is operated by the air bypass solenoid, and opens to permit air into the exhaust system, but closes to prevent exhaust from escaping.
Facts to Note:
The air diverter valve is not examined during any upkeep or service unless there’s a problem.
Over time and through normal use, the valve can wear and eventually fail.
Many pump assemblies include the air diverter valve and must be replaced together.
How to Fix:
The air diverter valve is confirmed to see if it needs to be changed
The faulty air diverter valve is removed
The new air diverter valve is installed
The air diverter valve is tested for operation
The vehicle is tested to ensure proper operation of the air diverter valve
Without a working secondary injection system, your car will not pass emissions, and you’ll probably notice less power and performance than normal. If you experience these symptoms, have one of your experienced mechanics who can diagnose your emissions system problem.
Common symptoms indicating you may need to change the Air Diverter Valve:
Check Engine light is on
Sluggish engine performance
Not passing emissions tests
Importance of this service:
The air diverter valve is just one small part of your car’s emissions system, but it’s very essential. If the valve sticks open or closed, the Check Engine light will come on, you will not pass emissions testing, and chances are that your engine’s performance will be hurt. We recommend having the problem analyzed accurately and the air diverter valve changed as soon as possible if it is defective.