Error Code P2433: What It Means & What To Do?

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Do you find any problem in the airflow/pressure sensor circuitry of the secondary air injection system? Then the P2433 error can be stored in your vehicle. Fresh air is permitted into the exhaust system by the secondary air injection system. This step is taken to prevent the dangerous pollutants which are emitted into the environment by the exhaust. The PCM receives a voltage signal from the secondary air injection system which carries the information of the pressure and flow of the secondary air injection system. If the signal of voltage is more than the specification which is determined by the manufacturer, then the P2433 error will be set and the check engine light will be illuminated.

The hydrocarbon tailpipe emission is reduced with the help of a secondary air injection system during cold start. Fresh air is drawn by the electric air pump and is pushed into the exhaust so as to start the catalytic converter operation. The PCM module or the PCM uses a secondary air injection pressure sensor to look after the air flow from the air injection pump. A 5-volt power is supplied by the PCM to the sensor and extra 5 volts is sent as reference or signal which is needed to ground the third circuit. A certain amount of reference voltage is returned by the sensor depending on the pressure change within the exhaust system.

If the voltage which is returned by the sensor is more than 4.8 volts which stays for 2 seconds, then the P2433 error will be set. This changes by mfg so it is best to check with the vehicle specifications.

What causes this problem with the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 1?

• Malfunctioning of the one-way check valve.
• The air injection valve might be faulty.
• Defective injection pump.
• Pressure sensor might be broken.
• Pressure sensor wire might be burnt, shorted or damaged.
• Defective or eroded pressure sensor connector.
• The pins of the pressure sensor connector might be bent.
• Failure of the vacuum switching valve.
• The wires of the vacuum switching valve might be defective, shorted or worn out.
• Broken or defective vacuum switching connector.
• Dented pins of the vacuum switching connector.

1. Air Pressure Sensor - If the air pressure sensor is faulty, then the acceleration by the vehicle will be very rough. Fix it instantly to avoid P2433 error code.
2. Powertrain Control Module - Conditions of misfire and stalling of the vehicle are the popular symptoms of a faulty PCM. Do you find these symptoms in your vehicle? Then, replace the faulty PCM instantly.
3. Air Injection Valve- Check if the air injection valve is broken or damaged? If so replace them as soon as possible.
4. Air Injection Pump - Faulty or defective air injection pump can cause the malfunctioning of the vehicle. Repair or fix it immediately to avoid further troubles.
5. Vacuum Switching Valve - A defective or damaged vacuum switching valve can show this error code. Replace the damaged part as soon as possible.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P2433 code by mentioning some major symptoms below:

Common Symptoms

• The sluggish situation might make the engine to stall.
• Unwanted noise from the secondary air injection system.
• The check engine light will be turned on.
• The engine might keep stalling as you start the vehicle.
• As you accelerate, the engine might hesitate to start.
• The error code will remain in the PCM.

Have a look at some ways with which you can correct the P2433 code:

• Altering the faulty one-way check valve.
• The faulty air injection valve needs replacement.
• The air injection pump has to be changed.
• The defective pressure sensor needs to be replaced.
• The broken, burnt or frayed pressure sensor wires have to be fixed.
• The sensor connector which might be eroded or faulty pressure has to be made alright.
• Correcting the bent pins of the vacuum switching connector.
• Fixing the broken switching valve.
• The damaged, burnt or shorted vacuum switching connector has to be fixed.
• Altering the rusted or molten vacuum switching connector.
• The bent pins in the vacuum switching connector have to be fixed.

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of air flow pressure sensor, powertrain control module, air injection valve, air injection pump, vacuum switching valve and a lot more. We are sure that now all your issues would be resolved.

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

• Collect the freeze frame data and diagnostic trouble code which is stored in the PCM with the help of a scanner.
• Check for frayed, broken or shorted wires of the vacuum switching valve and replace or fix them as needed.
• Inspect if the vacuum switching valve connector is defective, corroded or bent and fix them as necessary.
• Every of the diagnostic trouble code from the PCM must be removed and check the vehicle for a complete test drive to see if the P2433 error pops up.
• Repair or replace the pressure sensor connector if they are damaged, broken or if the pins are bent.
• Every of the diagnostic trouble code from the PCM must be removed and check the vehicle for a complete test drive to see if the P2433 error pops up.
• Verify for the proper functioning of the one-way check valve and fix or repair them as needed.
• Repair or replace the pressure sensor connector if they are damaged, broken or if the pins are bent.
• Every of the diagnostic trouble code from the PCM must be removed and check the vehicle for a complete test drive to see if the P2433 error pops up.
• The proper functioning of the air injection pump must be checked.
• Make sure to check the air injection pump hose for damaged or free connections and fix them immediately.
• The fuse of the air injection pump must be inspected.
• See if there are any damaged wires or pumps which gives rise to blown fuse and repair or alter them as desired.

Common Mistakes When Diagnosing the P2433 Code

Before you start the diagnostic procedure of the P2433 error code, the one-way check valve has to be verified. One of the common mistakes for P2433 error code is the defective one-way check valve. So avoiding to check them can lead to misdiagnosis and replacements of several other secondary air injection pump. Adding a drain tube into the pump housing is very important while you change the secondary air injection pump. If this step is missed, then the secondary air injection pump can be malfunctioning.