Checking the cable
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.
Check the cable between intake air temperature (IAT) sensor connector terminal #1 and engine control module (ECM) terminal #48. Check for a short-circuit to ground according to Short-circuit to ground, permanent faults .
Remedy as necessary.
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Refer to Verification