Check the wiring and connectors

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.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Check the connectors of boost pressure sensor 2 (MAP) and the engine control module for contact resistance and oxidation as described in Contact resistance and oxidation .

Remedy as necessary.

Fig 2: Identifying Atmospheric Pressure Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Checking boost pressure sensor signals