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what is a secondary air injection system malfunction

by Isabel Hirthe Published 3 years ago Updated 2 years ago

Report Ad. 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.Apr 9, 2022

What is a secondary air injection system?

The secondary air injection system, is actually a component of the exhaust system. Since no internal combustion engine is 100% efficient, there will always be some unburned fuel in the exhaust. Consequently, this increases hydrocarbon emissions. As a result, the air injection system was created.

What causes a secondary air injection pump to fail?

A faulty pressure relief valve can cause a secondary air injection pump to malfunction, usually, this is caused by it getting clogged with rust or debris on the diaphragm that is responsible for regulating pressure on your fuel tank.

Where is the secondary air injection pump located on a car?

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. You can locate it by looking for something like the picture here above or below.

What is a secondary air injection pump (SAIP)?

The Secondary Air Injection Pump is a small device located on or near your car’s exhaust system. It takes in ambient air from the atmosphere. It mixes it with fuel that comes out of the engine before entering the internal combustion engine, where the combustion process occurs at high temperatures over 500 degrees Fahrenheit (260 C).

How do you fix a secondary air injection system malfunction?

What repairs can fix the P0410 code?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.

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 I drive 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 much does it cost to replace a secondary air injection pump?

If it is broken, then you need to replace it as quickly as possible. Overall, repairing a secondary air injection system will cost you around $450. This cost is split between the cost of parts and the cost of labor. New parts will cost about $250 while labor will usually cost another $150-$200.

Can you drive without secondary air pump?

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.

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.

What causes P0410?

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.

What is Mercedes secondary air pump?

The secondary-air pump draws in ambient air and injects it into the exhaust manifold downstream of the exhaust valves. There is a separate integrated air filter if the air is not drawn in from the intake system but rather directly from the engine compartment.

How do you test a secondary air injection system?

The secondary air valve can be quickly inspected in an easy way: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 cars have secondary air injection?

Secondary Air Injection Systems The latest systems use an electric motor to pump air. These systems are critical for the life of the catalytic converter. Electric motor systems can be found on many new vehicles like the GM LS series, Toyota V8s and California emission Ford 3.8 V6s and 2.0 four cylinders.

How to fix a leaking air pump?

To get rid of this error code, you can do the following: 1 Replace both the air pumps and the one-way check valve 2 Try and clean the air pump and test it. The one-way air check valve must be replaced as well 3 Replace the inlet hose of the air pump 4 Replace the fuse of the air pump (you can find it under the hood)

Why does my air pump freeze?

During colder seasons, particularly in seasons with higher humidity, water can be excessive and may partially fill the air pump and freeze there. Obviously, if the PCM triggers the pump on, the pump will not turn, and this results to overloading of the circuit and “pop” the fuse.

Why does my exhaust pump have a one way check valve?

This code is actually pretty common, and it’s usually caused by air pump pressure escaping to the outside if any of the air pipes that lead to the combustion valve is damaged or lodged after changing the spark plug.

What to do if you don't hear the air pump motor start?

If you DON’T hear the air pump motor start – Inspect the SAS Air Pump and relay.

Where is the fuse on an air pump?

Replace the fuse of the air pump (you can find it under the hood )

Can you replace an air pump in a Tsb?

TSB will require replacement for the air pump and the installation of a new secondary injection hose. Simply replacing the air pump will not always solve the problem, as a matter of fact, it may come back over and over again. When replacing the air pump, it is important to clean the hoses and replace he one-way check valve.

What happens if you have a problem with your secondary air injection pump?

If there is ever a problem with your secondary air injection pump, then more hydrocarbon pollutants will be in the fumes which come out of your tailpipe. You won’t realize this until you receive an emissions test.

How to tell if secondary air injection pump is bad?

One of the early symptoms of a bad secondary air injection pump is the Check Engine warning light turning on. The engine control unit can automatically detect when the secondary air injection pump has a problem.

What is secondary air pump?

What Does a Secondary Air Pump Do? 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.

Why is my air pump not accelerating?

Poor acceleration could be caused by several mechanical issues, but a bad secondary air injection pump is certainly one possibility. A failed emissions test in conjunction with weak acceleration is a decent indicator that it is the pump’s fault.

What to do if your air pump is stalling?

If you’ve already experienced engine stalling, poor acceleration, and a check engine warning light, then you need to have the secondary air injection pump checked out immediately . If it is proven to be the problem, have it replaced by a certified mechanic.

What causes a bad air to fuel ratio?

A faulty secondary air injection pump will cause problems for the air-to-fuel ratio in your internal combustion engine. If this ratio is too lean (not enough fuel), then your engine will have trouble generating speed whenever you step on the gas pedal.

Can you fail an emissions test if your air pump is bad?

Not only does this spell trouble for the environment, but it also spells trouble for whenever you get an emissions test. If you happen to live in a state which requires emissions testing, you will fail the test if your secondary air injection pump is bad.

What is secondary air injection system?

The Secondary Air Injection System (SAIS) is a part of the vehicles exhaust system . Manufacturers began introducing them in the 1960’s to help reduce hydrocarbon and carbon monoxide emissions, both of which are result of incomplete combustion. On Toyota and Lexus vehicles that have SAIS it is only commanded to operate after a cold start, which is when the engine has been sitting for 7 hours or longer. The SAIS provides oxygen rich ambient air into the exhaust manifold downstream of exhaust valves. It will do this for approximately 30 – 90 seconds until the engine gets to operating temperature and then shut off.

What is the purpose of secondary air injection?

Again, the purpose of the Secondary Air Injection System is to reduce emissions after a cold start by burning fuel that made it through the engine un-combusted . But how is this accomplished? As we learned in high school science class, oxygen is one of the elements required for combustion. Most of the air sent through the induction chamber for primary combustion is depleted, leaving exhaust lacking oxygen. That said, the SAIS reintroduces oxygen rich air into exhaust allowing unburned fuel to continue burning before being expelled into the atmosphere.

How does a SAIS work?

This process is carried out by the various components of the SIAS as follows. On cold start ignitions the Air Injection Drivers will command the Air Switching Valves to open and the Air Pumps to, you guessed it, pump air. The air is sent through the Air Switching Valves and injected into exhaust manifold up stream of the catalytic converters. When the air/oxygen provided by the SAIS mixes with the post combustion exhaust oxidation occurs. Now replenished with oxygen hydrocarbons and carbon monoxide can oxidize into less harmful emissions like water and carbon dioxide. The continued burning of fuel also increases the temperature of exhaust gas which helps the catalytic converters heat up to operating temperature quicker. It typically takes 30 -90 seconds and once operating temperature is achieved air from the SAIS is no longer needed and the SAIS stops operating. The Air Pumps turns off and the Air Switching Valves close. If the Air Switching Valve does not close than exhaust can leak back into the SAIS which can lead to additional issues.

How to check secondary air system?

Before testing, ensure that the engine is cold and the vehicle has not been driven for at least 10 hours. Start the engine and measure the voltage at the O2 sensor with a scanning tool. If the voltage drops below 125 millivolts (0.125 volts) after about 10 seconds, this means that the secondary air system is functioning properly. However, if the voltage does not drop, this is an indication that the secondary air system is defective.

Where is the air injection pump located?

Open the hood of the vehicle and locate the air injection pump. It is located at the front of the engine, with the serpentine belt surrounding it . Make sure there is a belt routing diagram under the car’s bonnet so that you know how to re-attach the serpentine belt.

What is an OBD2 scanner?

The OBD2 scanner is able to read the information stored in the on-board diagnostic system. You can either purchase the basic code reader, which provides only specific information related to the code, or you can purchase the advanced scanner, which also allows monitoring and recording of live data.

How to remove serpentine belt from a pump?

Remove the serpentine belt with a ratchet and disconnect any hoses from the pump.

What is the code for OBD2?

Connect the OBD2 Scanner. To diagnose the trouble code P0410 it is important that you have an OBD2 scanner with you. Every vehicle manufactured after 1996 is equipped with an onboard diagnostic system that stores information on trouble codes for self-diagnosis and reporting.

How much does it cost to replace an air pump?

The average cost of replacing the air injection pump is between $300 and $400 depending on the car model and brand. Labor costs are around $100, while the part itself costs around $220 to $260.

What happens if you ignore P0410?

The trouble code P0410 does not cause serious problems with the driving behavior, but it drastically reduces the fuel consumption of the car. In addition, your car will start emitting dangerous pollutants. If the error code is ignored for too long, both the car’s engine and exhaust system may be damaged.

What is secondary air injection?

The secondary air injection system, is actually a component of the exhaust system.

How does an air injection smog pump work?

So, the air injection smog pump pushes air into the exhaust system, right after the exhaust manifold. Therefore, helping intercept and burn those unburned fuels.

What happens when an air pump diverter valve fails?

When the air pump diverter valve fails, it can lead to a variety of problems. In addition to a significant increase in the vehicle’s, tailpipe emissions. This is all done, after the combustion process is completed. That’s why, this device has no effect on engine performance.

What is an air pump diverter valve?

So, the air pump diverter valve, allows air supplied from the air pump, to be pumped; into the exhaust stream. Thus, reducing hydrocarbon and carbon monoxide tailpipe emissions. Consequently, it functions, as a one-way valve; allowing the air to pump through the exhaust.

What is the pump type?

Pump Type. The first system known as, the Pump Type, includes an air pump; common ly known as the smog pump. It is responsible for supplying fresh pressurized oxygen; to the exhaust stream, through the exhaust manifold.

What is the second type of exhaust system?

Pulse Type. The second type of system known as, the Pulse Air System is much simpler. It relies on the vacuum created in the exhaust stream, as it travels down the exhaust manifold.

What is the code for OBD II?

P0410 is an OBD-II generic code, that the engine control module (ECM) detected. Because, the engine (O2) sensor did not detect an increase in the (O2) level in the exhaust; when the air injection system was activated.

What is the Function of Secondary Air Injection Pump?

The Secondary Air Injection Pump is a small device located on or near your car’s exhaust system. It takes in ambient air from the atmosphere. It mixes it with fuel that comes out of the engine before entering the internal combustion engine, where the combustion process occurs at high temperatures over 500 degrees Fahrenheit (260 C).

How to Diagnose a Bad Secondary Air Injection Pump?

If you’re experiencing any of the symptoms described above, it’s important to take your car in for a diagnostic test. There are a few things that a mechanic will look for when trying to diagnose a bad air injection pump:

Replacement Cost of Secondary Air Injection Pump

The average price range for most models lies between $300-$500 and can be higher for luxury vehicles like Mercedes Benz or BMWs.

Conclusion

The engine control unit with an air pump reduces emissions, should your engine need a little help in that department. If you’re driving around with your SAI pump locked up, then you’re not doing anyone (least of all yourself) any favors and maybe causing some damage to your engine.

Frequently Asked Questions

Yes, you can drive without a secondary air pump for some time. But to do this, your car needs to be over 15 years old.

How to tell if you have a faulty secondary air injection pump?

1. Check Engine Light . Your vehicle’s manufacturer fills it to the brim with sensors, and these sensors monitor just about everything that your car does. So, it’s no surprise that if you have a faulty secondary air injection pump one of these sensors will tell the ECM to let you know through a check engine light .

Where is the secondary air injection pump 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. You can locate it by looking for something like the picture here above or below.

How to tell if air injection pump is bad?

The most common symptoms of a bad air injection pump are a check engine light or a failed emissions test. But while those are the most common symptoms, they aren’t the only thing you need to look out for.

What is the SAI pump?

Every auto manufacturer is required to meet them, which means that they need to install additional components on your vehicle. One of those components is the secondary air injection pump, also known as the SAI pump. And while the secondary air injection pump does an outstanding job at lowering your emissions, it does tend to wear out after a while.

Why is my ECM low idle?

That’s because as you press the accelerator, your vehicle produces more hydrocarbons, which can be enough to get the sensor working as it should . This gets the ECM back to sending the correct readings to the engine.

How much does it cost to replace an air pump?

The average secondary air injection pump replacement cost is between $250 and $400. This is significantly cheaper than replacing the primary air pump, which can cost from $600 to $700.

Do secondary air injection pumps pass emissions test?

Your secondary air injection pump is an emissions component, so it’s no surprise that if it’s acting up, you’re not going to pass an emissions test. The more fresh air that your catalytic converter gets, the better it can do its job.

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Definition

  • Error Code P0410 refers to a problem with the emissions system, most probably a issue with the air pump. The job of the air pump is to send air to the exhaust to decrease the emissions. It uses air from the outside and pumps it to the one-way check valves to every bank of the exhaust. This code is actually pretty common, and it’s usually caused by ...
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Common Symptoms

  1. Check Engine light is on
  2. Engine hesitates during acceleration
  3. Noticeable noise caused by stuck air pump
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Possible Causes

  1. Faulty Air Pump Check Valve(s)
  2. Defective Vacuum Lines or Air Control Solenoids
  3. Defective Air Pump or Air Pump Relay
  4. Restricted System or System Plugged with Carbon
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How to Check

  • When this error code is set, the Powertrain Computer Module (PCM) doesn’t see the front oxygen sensor voltage drop significantly, where the air pump is expected to add outside air to the exhaust system and help burn off excessive HCs and CO. Thus, to diagnose this error code, it is important to use the Scan Tool during a cold start. Also, some scan tools provide technicians with ways to …
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How to Fix

  • It is important to note that there is a TBS (Technical Service Bulletin) to check and repair this code for a number of GM models. TSB will require replacement for the air pump and the installation of a new secondary injection hose. Simply replacing the air pump will not always solve the problem, as a matter of fact, it may come back over and over again. When replacing the air pump, it is import…
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        12
        bing_news_description
        13
        bing_videos
        14
        bing_images
        15
        bing_search_result_title
        16
        bing_search_result_description
        17
        bing_search_result_url
        18
        bing_paa_questions
        19
        bing_paa_answers
        20
        bing_slider_faq_questions
        21
        bing_slider_faq_answers
        22
        bing_pop_faq_questions
        23
        bing_pop_faq_answers
        24
        bing_tab_faq_questions
        25
        bing_tab_faq_answers
        26
        google_faq_questions
        27
        google_faq_answers
        28
        google_rich_snippet
        29
        google_search_result
        30
        indexedArray
        31
        total_images
        32
        total_videos
        33
        settings
        34
        url_current
        35
        menus
        36
        sidebar
        37
        i
        38
        __currentLoopData
        39
        loop
        40
        item
      uri
      GET {post}
      middleware
      web, checkdate
      as
      post.show
      controller
      App\Http\Controllers\Frontend\json_data\PostController@show
      namespace
      where
      file
      app/Http/Controllers/Frontend/json_data/PostController.php:18-166
      7 statements were executed2.82s
      receivinghelpdeskask
      • select * from `posts` where `published_at` <= '2025-06-10 13:48:54' and `slug` = 'what-is-a-secondary-air-injection-system-malfunction' and `posts`.`deleted_at` is null limit 1
        16.21ms/app/Providers/RouteServiceProvider.php:54receivinghelpdeskask
        Metadata
        Bindings
        • 0. 2025-06-10 13:48:54
        • 1. what-is-a-secondary-air-injection-system-malfunction
        Backtrace
        • 15. /app/Providers/RouteServiceProvider.php:54
        • 18. /vendor/laravel/framework/src/Illuminate/Routing/Router.php:842
        • 19. Route binding:39
        • 20. /vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:167
        • 21. /vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php:78
      • select * from `json_post_contents` where `json_post_contents`.`post_id` = 184517 and `json_post_contents`.`post_id` is not null and `rewrite_id` = 0
        7.47msmiddleware::checkdate:30receivinghelpdeskask
        Metadata
        Bindings
        • 0. 184517
        • 1. 0
        Backtrace
        • 19. middleware::checkdate:30
        • 20. /vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:167
        • 21. /vendor/laravel/jetstream/src/Http/Middleware/ShareInertiaData.php:61
        • 22. /vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:167
        • 23. /vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php:50
      • select * from `nova_menu_menus` where `slug` = 'header' limit 1
        920μs/vendor/outl1ne/nova-menu-builder/src/helpers.php:32receivinghelpdeskask
        Metadata
        Bindings
        • 0. header
        Backtrace
        • 15. /vendor/outl1ne/nova-menu-builder/src/helpers.php:32
        • 17. /vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 19. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:261
        • 20. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `nova_menu_menu_items` where `nova_menu_menu_items`.`menu_id` = 1 and `nova_menu_menu_items`.`menu_id` is not null and `parent_id` is null order by `parent_id` asc, `order` asc, `name` asc
        370μs/vendor/outl1ne/nova-menu-builder/src/Models/Menu.php:35receivinghelpdeskask
        Metadata
        Bindings
        • 0. 1
        Backtrace
        • 19. /vendor/outl1ne/nova-menu-builder/src/Models/Menu.php:35
        • 20. /vendor/outl1ne/nova-menu-builder/src/helpers.php:33
        • 22. /vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 24. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:261
      • select * from `nova_menu_menu_items` where `nova_menu_menu_items`.`parent_id` in (1) order by `order` asc
        270μs/vendor/outl1ne/nova-menu-builder/src/Models/Menu.php:35receivinghelpdeskask
        Metadata
        Backtrace
        • 24. /vendor/outl1ne/nova-menu-builder/src/Models/Menu.php:35
        • 25. /vendor/outl1ne/nova-menu-builder/src/helpers.php:33
        • 27. /vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 29. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:261
      • select `id`, `post_title`, `slug` from `posts` where `status` = 'publish' and `posts`.`deleted_at` is null order by RAND() limit 10
        2.78s/app/View/Composers/SidebarView.php:22receivinghelpdeskask
        Metadata
        Bindings
        • 0. publish
        Backtrace
        • 14. /app/View/Composers/SidebarView.php:22
        • 15. /app/View/Composers/SidebarView.php:12
        • 16. /vendor/laravel/framework/src/Illuminate/View/Concerns/ManagesEvents.php:124
        • 17. /vendor/laravel/framework/src/Illuminate/View/Concerns/ManagesEvents.php:162
        • 20. /vendor/laravel/framework/src/Illuminate/View/Concerns/ManagesEvents.php:177
      • select * from `fake_users` where `fake_users`.`id` = 43696 limit 1
        8.75msview::2dd102cf0462e89a4d4d8bc77355d767652bf9aa:15receivinghelpdeskask
        Metadata
        Bindings
        • 0. 43696
        Backtrace
        • 21. view::2dd102cf0462e89a4d4d8bc77355d767652bf9aa:15
        • 23. /vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:108
        • 24. /vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
        • 25. /vendor/livewire/livewire/src/ComponentConcerns/RendersLivewireComponents.php:69
        • 26. /vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:61
      App\Models\FakeUser
      1
      Outl1ne\MenuBuilder\Models\MenuItem
      1
      Outl1ne\MenuBuilder\Models\Menu
      1
      App\Models\JsonPostContent
      1
      App\Models\Post
      11
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          _flash
          array:2 [ "old" => [] "new" => [] ]
          PHPDEBUGBAR_STACK_DATA
          []
          path_info
          /what-is-a-secondary-air-injection-system-malfunction
          status_code
          200
          status_text
          OK
          format
          html
          content_type
          text/html; charset=UTF-8
          request_query
          []
          request_request
          []
          request_headers
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          array:24 [▼
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  "cf-visitor" => array:1 [▶
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]
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            0 of 0   
          array:55 [▼
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]
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            0 of 0   
          array:4 [▼
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  "_previous" => array:1 [▶
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  ]
  "_flash" => array:2 [▶
    "old" => []
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  "PHPDEBUGBAR_STACK_DATA" => []
]