My 1995 S80 Volvo keeps idleing high Then Cuts off what can this be?

SOURCE: volvo s80 alarm

Have the codes read out for the vehicle. It is likely that the siren for the alarm is causing the false alarm. If the siren is bad, there will be a code set in the central electrical module. (CEM)

SOURCE: 1999 Volvo S80 T6 slightly fluctuating idle/blinking head lights

I had a similar problen on my s60 I got the trottle body properly cleaned and it fixed it right up

SOURCE: 99 Volvo s80 transmission problems

i got an volvo s80 and today i got the message on dashbord like this TRANSMISION REQUAIRED SERVICE what its that ?any one can help ?

SOURCE: s80 volvo

RELAY
Pull out headlight relays and swap over. this will tell if one is faulty

SOURCE: how to reset service message on volvo s80?

2002-2007 All Volvo Models

• The service reminder indicator lamp illuminates for 120 seconds when the ignition is first switched on
• Insert key and turn Ignition Switch to position I
• Press and hold in the reset button for the trip odometer
• Turn the Ignition switch to position II (within 2 seconds)
• Hold the reset button for the trip meter pressed in until the original trip counter value blinks and is redisplayed
  (For all vehicles 2003- a general yellow lamp will light when the reset button must be released.)
• Release the reset button for the trip odometer within 4 seconds. The instrument gives an audible signal when resetting has succeeded
• If the trip meter is already reset the reset button should be held in for a minimum of 10 seconds and a maximum of 14 seconds.
• If the reset button for the trip odometer is not released within 4 seconds, the service reminder indicator (SRI) is not reset.