Error Code P2437: What It Means & What To Do?

<<See All OBD Codes

Are the electrical wires burnt? Is the air pressure sensor faulty? Then there is a chance that the P2437 error is stored in your vehicle. This code is usually known as the secondary air injection system air flow/pressure sensor circuit low bank 2. The secondary air injection system (AIR) pushes fresh air inside the exhaust system as the cold engine starts up so that the exhaust emissions which is produced during warm-up time can be easily burnt. With the help of an air pressure sensor, the functionality of the AIR system can be monitored. The P2437 error code will get stored if an erratic signal is sent by the AIR pressure sensor. In a few vehicles, you can find this pressure sensor as a part of the AIR control solenoid.

Lessening the hydrocarbon exhaust emissions during engine start-up is the main aim of the secondary air injection system air flow/pressure sensor circuit bank 2 during cold weather conditions. An air pump is initiated by the PCM to send pressurized fresh air to quicken the catalyst operation by decreasing the harmful exhaust gas level. The engine can reach this optimum temperature quickly by following this process. The air system pressure sensor closely looks at the pressure at the air control solenoid valve inlet so as to open and close the valve at determined temperatures and pressures centered on the manufacturers' recommendations. If the voltage or resistance is too low than the normal threshold in the secondary air injection system air flow/pressure sensor circuit bank 2 and if it is detected by the PCM, then the P2437 error will be set and the check engine light will blink.

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

• Malfunctioning of the secondary air injection pump.
• One-way check valve might be defective.
• The air control solenoid valve might be damaged.
• Faulty air pressure sensor.
• Burnt electrical wires.
• Detached or eroded connectors.
• PCM might be defective.

1. Powertrain Control Module - Does your engine turn off without any reason? Then it’s a high time to replace your PCM as it can be faulty.
2. Engine Control Module - The behavior of your engine will be very erratic if the ECM is faulty or broken. Get it fixed or replaced as soon as possible.
3. Engine Wiring Connectors - Do you find any cuts or leaky areas? Then it’s high time to replace the engine wiring connectors from PartsAvatar as they cause malfunctioning of the vehicle.
4. Secondary Air Injection Pump - Insufficient voltage supply to the vehicle can cause the malfunctioning of secondary air injection pump. Avoid the P2437 error by fixing it quickly.
5. Air Pressure Sensor - Malfunctioning of the vehicle will take place if the air pressure sensor is contaminated. Replacing it quickly can help you to avoid the P2437 error code.

Interested in knowing the symptoms to OBD code P2437? If yes, then you have arrived at the right place. We at PartsAvatar have listed out few common symptoms associated with this fuel injector problem.

Common Symptoms

• At an idle situation, you might find the engine to be stalling.
• Starting trouble by the engine.
• Clamors from the secondary air injection system.
• Engine performance seems to be bad.
• Flashing of the check engine light.

After understanding the symptoms and few common causes behind the OBD error code, we are here to help you out in understanding the ways and means to correct the issue. To solve any issue, you need to follow certain steps, and to solve OBD error code P2437, you will need to undergo the following replacements:

• The secondary air injection pump must be changed.
• Replacing the defective one-way check valve.
• The air pressure sensor which might be damaged needs alteration.
• Substituting the air control solenoid valve.
• The rust from the connectors must be cleaning.
• Fixing the faulty wires.
• PCM needs alteration.

Apart from the fuel injector, you might need to undergo a few more replacements. You might need a powertrain control module, a secondary air injection pump, air pressure sensor, and many other parts. Where to get them from? Well, if you want quality parts, then we can prove to be your dream destination.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2437 code to be stored:

• As a primary step for any failure, you must check the TSB which is specific to your vehicle by year, model and power plant. This can help in saving a lot of timing by guiding you on the right path.
• Depending on your vehicle, the circuit may include several other components like the secondary air injection pump, check valve, pressure sensor, air control valve and the PCM. Carefully check the linked wires
• for any damages like scraping, rubbing, bare wires or burnt wires.
• Secondly, inspect the connectors as well as the connections for proper security, erosion and defective pins.
• This process must contain every wire and the components which also includes the PCM.
• You can always check the particular data of the vehicle to confirm the configuration of the circuit and make sure that every component is incorporated within the circuit which also has a fuse and fuse-able link in a few applications.
• Verify the check-valve to make sure that the airflow is in one way.
• If you find the ice in the secondary air injection pump especially during cold condition, it is a sign of faulty one-way check valve which allows the condensations to enter the pump from the exhaust.

Advanced steps:

The advanced step for each vehicle varies and needs the proper tools to perform correctly. The process needs a digital multimeter and particular technical references for your vehicle.

Voltage Check:

The requirement of the reference voltage and acceptable ranges will vary depending on specific models of your vehicle as well as the configuration. The technical data which is specific contains the troubleshooting charts and the appropriate order in order to assist you with the right diagnosis. While inspecting, if you don’t find the power source or ground, you have to check the integrity of the wires, connectors, and other components by carrying out a continuity test. Remove the power from the circuit and carry out the continuity test and the correct reading for the wires and connections must be 0 ohms resistance. If you don’t find resistance or continuity, then the wires might be open, shorted or eroded which must be changed.

Common Mistakes When Diagnosing the P2437 Code

• Damaged air control solenoid.
• Broken PCM.
• Malfunctioning of the secondary air system pressure sensor.
• Some problem with the electrical wires.