P2432 - SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT LOW BANK 1

POST UPDATED IN February, 2023

Description of DTC code P2432 Generic

The Secondary Air Injection System Air Flow/Pressure Sensor circuit is responsible for decreasing hydrocarbon emissions, which come from the exhaust and are created during engine startup when the weather conditions are cold. The Powertrain Control Module is responsible for turning on the air pump, which delivers fresh, pressurized air for faster operation of the catalytic converter, which in turn reduces the level of exhaust gases. This pressure sensor monitors this value at the air control solenoid inlet to determine when to open and close the valve at certain pressures and temperatures.

If the PCM finds a voltage or resistance value in the Secondary Air Injection System Air Flow/Pressure Sensor circuit that is excessively below the set value, the P2432 OBDII fault code will be stored.

Symptoms of fault code P2432 Generic

  • Check Engine lamp illuminated.
  • Difficulty starting the engine.
  • During idling the engine stops.
  • The engine shows a decrease in engine power.

Causes of OBD2 P2432 Generic

The reasons for setting the P2432 OBD2 diagnostic code are as follows:

  • The circuit may have bad wiring or connectors.
  • The air injection pump may be in bad condition.
  • The one-way check valve may have been damaged.
  • The air control solenoid may have defects.
  • The air pressure sensor may be defective.

Possible solutions of the DTC code P2432 Generic

To troubleshoot DTC P2432 OBDII you must do the following:

  • To start the diagnosis it is necessary to consult the Technical Service Bulletins.
  • Thoroughly inspect all wiring and wiring connectors that are related to the secondary air injection system components. If these have damage such as burns, wear, or corrosion, you should make the necessary repairs or replacements.
  • Check that the check valve has the correct airflow in one direction only. If it allows ice to form in cold weather conditions, it is defective.
  • Perform reference voltage and ground signal checks to the system circuit. If these checks reveal a lack of power, you should check the continuity of the wiring. Repair it as required.

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