What to know about the Air Pump Check Valve:
In a secondary air injection system, air must be injected into the exhaust system, but exhaust fumes must not be able to escape. This is accomplished by using a one-way air pump check valve. Think of it as a one-way street — air can enter, but exhaust gases can’t leave.
SEE ALSO:HOW TO AIR DIVERTER VALVE CHANGE
These secondary injection systems are used to make sure a fuller burn of spent exhaust gases, which both improves fuel economy and eradicates pollution from the vehicle exhaust. It’s a key part of your emissions system. In general, the air pump check valve is fixed near the top passenger side of the engine, even though this can vary. Some vehicles have more than one check valve, as well.
Over time, the air pump check valve is subject to not only high heat, but also other forms of damage. It can deteriorate and degrade. While there is no set lifespan for these mechanisms, they can and do fail.
Facts to Note:
The air pump check valve is not examined during normal maintenance.
A failed valve will cause the Check Engine light to turn on.
Your car cannot pass an emissions test with a bad check valve.
How to Fix:
The air pump check valve is confirmed to see if it needs to be changed
The faulty air pump check valve is removed
The new air pump check valve is fixed
The air pump check valve is tested for operation
The vehicle is tested to ensure proper operation of the air pump check valve
A secondary air injection system is a key part of your emissions control, and the air pump check valve is a serious component. If it fails, it’s possible for exhaust gases to escape, or for fresh air to be blocked from entering the exhaust system. If you suspect a problem with your air pump check valve, have it analyzed and repaired by one of your expert mechanics.
READ ALSO:HOW TO REPAIR CAR VACUUM PUMP
What common symptoms indicate you may need to replace the Air Pump Check Valve?
Check Engine light on with check valve failure code
Will not pass emissions test
How important is this service?
While you won’t notice much in the way of performance degradation if the check valve fails, your Check Engine light could come on, and your car will not pass emissions testing. Because of this, you should replace a faulty air pump check valve as soon as possible.
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