P2436 - OBD Trouble Code

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Failure of the PCM is defined as the secondary air injection system air flow/pressure sensor circuit range/performance bank 2. The secondary air injection pump helps in pumping fresh air into the exhaust system when the engine starts during cold condition. The highly rich exhaust emission is burnt by the additional air which is produced as the engine warms up. The operation of the AIR system is looked after by the engine computer by using an AIR pressure sensor. The P2436 error code will get stored if the AIR pressure sensor returns back an irregular signal. The pressure sensor acts as a part of the AIR control solenoid in some vehicles.

During a cold start-up, the hydrocarbon exhaust emission is reduced with the help of a secondary air injection system. When the engine coolant temperature is found between 5-50°C (41-122°F), and the intake air temperature (IAT) is found between 5-60°C (41-140°F), this usually takes place.

By continuously supplying grounds to both the AIR pump and the AIR valve relays, the AIR system is activated by the PCM. This step helps in closing the internal contacts of the relays. The pump will run and the control/shut-off valve will open when both the AIR pump and the AIR control solenoid valve/pressure sensor assembly are strengthened.

Fresh air is sent by the AIR pump into the pipes/hoses through open control/shut-off valve and finally into the exhaust manifold. The additional air starts the catalyst operation, by helping it to reach the operating temperature very quickly. The AIR pump will stay ON for a short duration and after the control/shut-off valve is turned OFF. When the AIR pump is ordered to be OFF, it will not start or activate until the start of the next vehicle. The closed AIR control/shut-off valve will avoid the air/exhaust flow in either direction if the AIR system is sluggish.

The AIR system pressure sensor looks after the pressure at the AIR control solenoid valve/pressure sensor assembly inlet when it is ordered to be in ON/OFF state.

What causes this problem with the Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 2?

• Failure of the secondary air injection pump.
• Defective one-way check valve.
• The air control solenoid valve might be malfunctioning.
• Damaged air pressure sensor.
• The wires might be corroded or defective.
• Connectors might malfunction or they might be damaged.
• Failure of the PCM

1. Powertrain Control Module - Illumination of the check engine light proves that the PCM is defective or damaged. Get it fixed instantly by replacing it with a new PCM.
2. Engine Control Module - Engine stalling is one of the symptoms for a defective ECM which needs replacement as soon as possible.
3. Secondary Air Injection Pump - The secondary air injection pump can be faulty if there are any blocked or leaking lines. Get the right replacement from PartsAvatar.
4. Air Pressure Sensor - Air pressure sensor can turn out tobe faulty if there is very rough idle. Avoid the P2436 error by replacing the damaged air pressure sensor quickly.
5. Coolant Temperature Sensor - Overheating of the engine is the result of a malfunctioning coolant temperature sensor. Fix it as quickly as possible.

For us our customers are everything, and that’s why we will help you to diagnose P2436 code by mentioning some important symptoms below:

Common Symptoms

• Stalling of the engine when it is idle.
• Refusal of the engine to start.
• You might hear noises from the secondary air injection system.
• Performance by the engine is bad.
• The check engine light might keep flashing.

After you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is a few common steps to correct this issue with your vehicle’s.

• Replacement of the secondary air injection pump.
• Changing the damaged one-way check valve.
• The air pressure sensor needs replacement.
• Changing the air control solenoid valve.
• Cleaning the connectors which are rusty.
• Faulty wires have to be fixed.
• PCM needs replacement.

Apart from this, you might need to replace other damaged parts too like a powertrain control module, secondary air injection pump, air pressure sensor, engine coolant temperature sensor and more. You can easily find all these parts with us. Not only that you can get these parts shipped to your door free if your cart value happens to exceed $99.

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

• Start the troubleshoot method and check for the correct technical service bulletins that are precisely considered for your vehicle by year, model and transmission.
• This can guide you on the right path by saving a lot of time.
• Based on your vehicle, the circuit may include several other modules such as secondary air injection pump, check valve, pressure sensor, air control valve and the PCM.
• Check for damages such as the scraping, rubbing, or burn spots by visually checking these elements as well as the connectors and its connections to make sure it is safe.
• Connectors, as well as its connections, must be carefully inspected for erosion, defective pins, and security.
• The PCM along with the wiring connections and other components have to be carefully inspected.
• Look at the specific tech data of the vehicle and look for the configuration of the circuit and approve that every part which is in the circuit as it may contain the fuse or a fuse-able link in some applications.
• Visually inspect the check-valve and make sure that air flow is in one particular direction.
• In cold weather, if there is ice in the secondary air injection pump, it indicates that the one-way check valve is broken which permits condensation from the exhaust to enter the pump.

Advanced Steps

• The advanced procedure varies for every vehicle as they are specific and need proper diagnostic tools to carry out the diagnosis.
• Use a digital multimeter and appropriate technical references for your vehicle to start the process.

Voltage checks

• Based on the specific vehicle and configuration of the circuit, both the reference voltage and acceptable range will be changed.
• Troubleshooting charts and the appropriate sequence are included in the specific technical data to help with the proper diagnostic procedure.
• Continuity test has to be done to check the integrity of the wires, connectors and other connections if there is no power source or ground found in the process.
• Carry out the continuity test by removing power from the circuit and 0-ohm resistance must be set as normal reading for wires and connectors.
• The faulty wires which are open, shorted or eroded must be replaced or fixed if there is no resistance or continuity.

Common Mistakes When Diagnosing the P2436 Code

• Faulty air control solenoid.
• Malfunctioning PCM.
• Broken air system pressure sensor.
• Problematic wires.