What Causes Secondary Air Injection Malfunction?


A faulty pump is generally the most frequent cause of the system failing. Ingress of moisture can cause damage which results in seizure of the pump. Faulty ground and voltage supply can also cause the pump to fail.

Can you drive without a secondary air injection?

Technically speaking, you can drive without a secondary injection pump. However, doing so is not advised. This stems from the fact that a faulty secondary injection pump can cause a host of drivability-related issues, most of which can vary significantly in severity, on a case-by-case basis.

How do I fix P0411 code?

  • Air pump replacement.
  • Removing carbon buildup from secondary air system.
  • Vacuum hose replacement.
  • Air solenoid replacement.
  • Repairing or replacing wiring harness issues.
  • How do you fix a secondary air injection system malfunction?

  • Replacing the air injection pump and power relay.
  • Replacing O2 sensors that respond too slow as they age.
  • Replacing the air injection pump intake filter clogged with debris.
  • How much does it cost to replace a secondary air injection pump?

    How much does it cost to repair a secondary air injection system? You can expect to pay about $450 to replace your secondary air injection system. These costs are split between the cost of materials and the cost of labor. You can save money by replacing your system on your own.

    Where is the secondary air injection system located?

    The secondary air injection pump is usually located on the engine or at least in the engine bay. It can sometimes be hidden deep into the engine bay, but mostly you will find it installed pretty visible on the engine.

    How do I know if my smog pump is bad?

    One of the first symptoms of a bad or failing smog pump is a rough running engine. When a smog pump fails the finely tuned air-fuel ratios can be upset, and it will negatively affect the performance of the engine. The engine may have trouble idling, and may drop in engine speed, or stall when the pedal is pressed.

    What happens when secondary air pump fails?

    If your secondary air injection pump has failed, you may notice that the catalytic converter is not working as well as it should. This problem can lead to a loss in power and performance from your engine. The catalytic converter is the engine’s first line of defense against harmful emissions.

    How do you test a secondary air pump?

  • Loosen the connecting hose on the secondary air non-return valve leading to the secondary air pump.
  • If there are deposits on this side of the valve (finger test, see Fig.
  • Inspect the secondary air pump and replace it if necessary.
  • What does secondary air injection system incorrect flow mean?

    OBD-II Code P0411 is defined as a Secondary Air Injection Incorrect Flow Detected. What does this Mean? The Secondary Air System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the very rich exhaust emissions that are produced when the engine is warming up.

    What is the secondary air injection system?

    Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller secondary combustion of exhaust gases.

    What is an air injection diverter valve?

    The air diverter valve is operated by the air bypass solenoid, and opens to allow air into the exhaust system, but closes to prevent exhaust from escaping.

    How do you clean a secondary air injection valve?

    The basic procedure is to put solvent and compressed air into the SAI system on the top of the engine and clean the ports from the bottom until air runs freely through the passages. The supplies you will need two bottle of carburetor cleaner.

    Can I drive my car with a P0410 code?

    You may drive your vehicle with a P0410 however keep in mind your vehicle will not pass a smog inspection. Problems with the air injection system will not cause any driveability symptoms. The check engine light or malfunction indicator lamp will be illuminated as long as a P0410 is recorded in the ECC.

    How do I know if my secondary air pump is working?

    Start vehicle engine. If the power supply of the secondary air pump is fine, but the secondary air pump runs with a scraping, whistling or scratching noise or not at all, the secondary air pump is to be replaced. Check electrical contacts of voltage supply to secondary air pump.

    How much is an air injection pump?

    Air Pump Replacement Cost – RepairPal Estimate. The average cost for air pump replacement is between $465 and $554. Labor costs are estimated between $77 and $97 while parts are priced between $388 and $457. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.

    How much is an air pump at gas station?

    Some gas stations charge as much as $1.50 for air. And many drivers, not knowing any better, will drop quarters into the slot so they can fill their tires.

    How much is an air pump for a car?

    A standard air compressor for cars will run between $30 and $50. The price is determined by materials, the motor’s power, whether it’s digital or analog, and its hose. The most important thing is that it’s powerful enough to fill your tires since it won’t be of use without that ability.

    Can a secondary air pump cause a misfire?

    Can a Secondary Air Pump Cause a Misfire? Yes, a misfire is a common sign of a faulty secondary air system. If the pump isn’t working properly, there will be too much fuel and not enough oxygen in your vehicle, which often results in a misfire.

    Can you drive with a bad smog pump?

    Can You Drive With A Bad Secondary Air Pump? A bad air pump can be hazardous to your driving safety even if you fail a smog test. It is possible that reduced engine performance and driveability could result in your vehicle being unsafe.

    Can I drive with a bad air injection pump?

    Repairing a bad air pump

    While failing a smog test is a serious enough problem, the real danger from a bad air pump is the possibility that reduced engine performance and driveability could cause be hazardous to your driving safety.

    Can you drive with a bad air pump check valve?

    You will not notice anything significant in the way of vehicle performance, and you can continue to drive with a bad air pump check valve.

    What turns on the secondary air pump? (video)

    https://www.youtube.com/watch?v=pRSl_tS3kl0

    What causes P0410 code?

    Code P0410 is the result of the Engine Control Module (ECM) indicating a malfunctioning Secondary Air Injection System. This happens when the O2 sensor does not accurately detect the changes in the O2 level of the exhaust while the air injection system is functioning.

    How do I fix error code P2431?

  • Replacing the secondary air pump.
  • Repairing or replacing a wiring harness.
  • Resolving poor electrical connections.
  • What is code P2440 mean?

    OBD-II Code P2440 is defined as a Secondary Air Injection System Switching Valve Stuck Open. The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up

    Will a car run without a smog pump?

    Which begs the question: Does a car need a secondary air injection system to run? Strictly speaking, no, it doesn’t. If your car doesn’t have a smog pump, a couple things can happen.

    How does water get into secondary air pump?

    A leaking valve causes exhaust gas to enter the secondary air system. The water from exhaust condensation travels through the entire secondary air injection system and if the temperature drops below 0 degrees Celsius the water will freeze. In most cases the water causes the air pump to corrode.

    What is air blast injection in diesel engine?

    Air-blast injection is a historical direct injection system for Diesel engines. Unlike modern designs, air-blast injected Diesel engines do not have an injection pump. A simple low-pressure fuel-feed-pump is used instead to supply the injection nozzle with fuel.

    What is the main function of the auxiliary air valve in a fuel injection system?

    The auxiliary air regulator opens when the engine is cold to allow a small amount of additional air to bypass the throttle plate and boost the idle speed.

    How do you clean an air check valve? (video)

    https://www.youtube.com/watch?v=tqIn9rrKyY0

    How do I uninstall a second air pump? (video)

    https://www.youtube.com/watch?v=mIYDHZ7QS0A

    What is Mercedes secondary air pump?

    The secondary air injection pump (also referred to as a smog pump or SAI pump) is responsible for lowering the number of carbon emissions that come out of the tailpipe of a vehicle. This is necessary since a vehicle engine is never 100% efficient in the combustion process.

    What does the secondary air injection check valve do?

    The AIR check valve prevents reverse exhaust flow from entering the AIR system. If the check valve fails, hot exhaust gases can sneak back into the system, damaging components, such as the air pump and air management valves.


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