Guide To P2443 OBD Error Code Solutions

Secondary Air Injection is an emission control that uses a pump to send fresh outside air to the Exhaust System during cold engine start up, or when the engine is in open loop and pre-catalytic converter during in closed loop. It is either electric or turned by the drive belt. This process helps reduce the vehicle’s emission of harmful gases. The check valve which is located at the air supply line, keeps the exhaust gas from getting to the pump. There’s also a cut off valve to control the airflow, which can be either electrically controlled or vacuum controlled. When the PCM activates these valves, the vacuum automatically travels to the cut off valve, opening it and allow fresh air to flow. Some Air Systems only allow fresh air to flow, while some only comes with a check valve and the flow is regulated by an air pump with electromagnetic clutch.

During hard acceleration, the air pump gets deactivated, preventing backfire from the exhaust. To self-check, the PCM activates the Air System allowing fresh air to get to the exhaust system. The oxygen sensor then recognizes the fresh air as lean condition, and activates its short term fuel trims to move positive direction to compensate and make a good air fuel ratio. The PCM expects this process within a few seconds of self-test. If it is unable to see the short term fuel trim rise, the PCM will then intercept and look at this condition as a malfunction in the Air System, which will trigger the Error Code P2443.

What causes this problem with the Secondary Air Injection System Switching Valve Stuck Closed Bank 2?

• Malfunctioning vacuum switching valve
• Vacuum switching valve harness might be unlocked
• Vacuum switching valve circuit might have bad electrical connection
• Malfunctioning pressure sensor
• There can be inoperative air switching valve

1. Air Injection Pump – The most common problem occurs with the air injection pump. Check if the pump is problematic and replace it immediately.
2. Engine Control Module - Dead cells in batteries can cause a failure in the engine control module. Many times a battery is left in the rig long after a cell has died. This would affect the grounding in the car battery.
3. Powertrain Control Module - If there are some faults in the PCM, then it may throw off the timing and fuel settings of the engine, which can negatively affect the performance. A flawed PCM may cause the vehicle to experience a reduction in fuel efficiency, power as well as acceleration.
4. Air Control Valve Relay – Faulty air control valve relay will affect the emission system and thus needs immediate replacement. Buy new valve relay now!
5. Electronic Control Unit - Do you know that the poor performance or unexplained drops in fuel economy or efficiency are often associated to onboard car computer problems, or defective ECU issues?
6. Air Injection Check Valve – If the air injection check valve if faulty, it will affect the air intake into the exhaust. Replace it now!
7. Air Injection Solenoid – There might also be a problem with the injection solenoid. Thus, replace it now.
8. Exhaust Manifold – Does your mechanic notice a problem with the exhaust manifold? Buy new and replace it immediately.
9. Diagnostic Tools – Use factory grade diagnostic tools to resolve OBD code P2443 error. Buy new diagnostic tools and equipment for us.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Visibility in the check engine light
• The automobile might not run any different
• Backfiring in the exhaust during hard acceleration
• The automobile might fail emission testing

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Make sure to mend the faulty wiring or connections to the air injection system
• It is essential to restore the flawed exhaust pressure sensor to the secondary air injection system
• Carefully adjust the faults in the air control valve for the secondary air injection system

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of pcm, ecm, oxygen sensor, air injection system, air flow pressure sensor, powertrain control module, engine control module, maf sensor, pcm car, air fuel ratio sensor, mass air flow sensor, ecm car, pcm module, ecm module, secondary air injection pump and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

• Use a scan tool plugged into the vehicle's DLC port to check for any codes stored into the ECU. There may be history, present, or pending codes each with their own freeze frame data.
• Written down the codes and freeze frame data noted and then clear the code.
• Take the vehicle for a road test to try to duplicate the symptoms to see if the code reappears.
• Once this is done, perform a visual inspection of the air injection system specifically looking for damaged hoses, excess carbon, or broken components.
• Finally, monitor air pump operation using advanced scanning tools.
• Check for PCM faults and replace or reprogram as required.

Common Mistakes When Diagnosing The P2443 Code

• Unnecessary components getting replaced within the air injection system - usually when parts are just clogged but have not actually failed is the most common mistake. In these cases, the parts most likely just need to be cleaned.
• Many technicians clear the ECM memory codes before inspecting the freeze frame data for the main failure problem, so due to that the issue might be duplicated as well as repaired.
• Mistake of failing to clear the ECM codes after the codes are fixed.
• A lot of mechanics fail to verify the failure before attempting testing and repairs.