Description

Refer to DTC P0412 (See page ES-189).

DTC No.

DTC Detection Conditions

Trouble Areas

P2440

Pressure sensor detects pulsation of exhaust gas despite ECM commanding Air Switching Valve (ASV) to close, while engine running (2 trip detection logic)

• Open or short in ASV circuit

• Pressure sensor

• Pressure sensor circuit

• Air Injection Control Driver (AID)

• ECM

P2441

Pressure sensor detects no pulsation of exhaust gas despite ECM commanding Air Switching Valve (ASV) to open, while engine running (2 trip detection logic)

• Open or short in ASV circuit

• Air injection hose

• Pressure sensor

• Pressure sensor circuit

• Air Injection Control Driver (AID)

Air switching valve normal operation:

When the Air Switching Valve (ASV) is open, exhaust gas pulsation occurs in the secondary air passage. When the ASV is closed, exhaust gas pulsation does not occur in the secondary air passage.

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