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 for contact resistance and oxidation according to Contact resistance and oxidation
Check for too low fuel pressure according to Measuring fuel pressure EMS 2000
Check the intake system for leakage according to intake system/leak test
Check the exhaust system for leakage according to Checking the exhaust system for leakage
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 Replace the front heated oxygen sensor (HO2S) .
Fig 2: Identifying Heated Oxygen Sensor (HO2S)
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying EMS2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Resetting the adaptation