A person can get a wiring diagram for a Volvo S40, O2 sensor at most auto part stores. A Volvo dealership will also be able to help you with a wiring diagram.
I posted pictures on the location and replacement of an ambient temp. sensor for a 2001 S40. Google "ambient temperature sensor location/replacement" or go to Matthew's Volvo site and search there.
Thermostat and thermostat sensor (ect) bad
Which Tires for volvo S40?
Where is the radiator cap on a 2001 Volvo s40?
It's on the fuel pump inside the fuel tank
Next to the thermostat. you will see it when you remove the hose
How do i remove the washer bottle from a Volvo s40
How do i remove the washer bottle from a volvo s40
I'm not sure what you're asking, but if you mean that you are getting an OBD-II diagnostic code of P0128 from your Volvo S40, that code corresponds to a problem with coolant temperature. On a first generation Volvo s40 (99-04), this usually means that the thermostat or electronic coolant temperature sensor are malfuctioning or have failed.
Trouble code P1014 means: CMP Sensor/CKP Sensor Signals Not Compatible
I need a new battery for a 2007 Volvo S40 what are the specifications ?
how do u perform an oil change on the 01 Volvo s40