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Home >> Volvo >> 2008 >> S40 T-5, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Electronic Control Module (ECM) Diagnostic Trouble Codes - 3 Of 3 (644 Body)) >> ECM-8A: Idle Air Control (IAC) Valve. Signal Missing. Permanent Fault (B4204T3; 2004) >> Signal missing. Permanent fault >> Defective idle air control (IAC) valve

Defective idle air control (IAC) valve

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Try a new idle air control (IAC) valve according to Replacing the idle air control (IAC) valve .

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