Checking the connectors and components

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 front heated oxygen sensor (HO2S) and control module connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check the intake system for air leakage according to intake system/leak test .

Remedy as necessary.

Other information:
- To access the control module, see Engine control module (ECM), replacing
- To replace the front heated oxygen sensor (HO2S), see Replacing lambda sonde front .
Fig 2: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Heated Oxygen Sensor (HO2S)
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Resetting the adaptation