P2432

DTC P2431 secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1
DTC P2432 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low Bank1
DTC P2433 Secondary Air Injection System Air Flow / Pressure Sensor Circuit High Bank1
DTC P2436 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank 2
DTC P2437 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low Bank 2
DTC P2438 Secondary Air Injection System Air Flow / Pressure Sensor Circuit High Bank 2

DESCRIPTION

DTC Detection Condition:

The Secondary Air injection (AIR) system consists of an air pump, the Air Switching Valve (ASV), a pressure sensor, the Air Injection Control Driver (AID) and the ECM. For a short time after cold engine starts, the AIR system pumps secondary air to the exhaust port of the cylinder head to purify the exhaust emissions. The secondary air is supplied by the air pump and is pumped to the exhaust port through the ASV.

The AID drives the ASV and the air pump according to command signals transmitted by the ECM. The pressure sensor detects the pressure in the secondary air passage when the AIR system is ON and OFF, and transmits a pressure signal to the ECM.

The AID is not only equipped to drive the pump and valve, but also with a diagnosis function to detect malfunctions in the AIR system circuit.

HINT: As a large current is required to drive the air pump and ASV, an AID is installed to this system.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the air switching valve in the secondary air injection system.

If there is a defect in the sensor or the sensor circuit, the voltage level deviates from the normal operating range, the ECM interprets this deviation as a malfunction in the pressure sensor or circuit and sets a DTC.

Wiring Diagram (Part 1):

Wiring Diagram (Part 2):

Step 1:

Step 2:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.