I have a 1997 volvo 850. The red arrow on dash came on and vehicle would not start.I had to get a boost.what does this mean

SOURCE: 1994 Volvo 850 2.4L Auto transmission

Clear your engine and transmission codes, its a small box in the pass side engine compartment right behind the headlight. Search "Bay 13 Volvo" and that has all the information to check and clear the codes. It also has a list of what the codes mean to help you.

SOURCE: 1997 volvo 850 abs light and trac light on

you will have to have the car diagnosed with a code reader most garages have them prices from £20-90 to diagnose the fault + parts.

SOURCE: volvo 850 won't start occasionally

Hey Kolby!

Sounds like you've got an issue with your alarm module, causing the immobilizer to activate (also known as a "start inhibitor"). I'm not sure what type of alarm you've got, but this will probably help you find out if there is something wrong with it:

There is a panel with relays on it behind the dash. At the bottom of the steering column, by the drivers feet, there is a panel. Remove it to get access to the relay panel (just a couple of torx screws, no breakable clips as far as I can remember). Remove the "double size" relay (probably marked 210-211). Put a wire between the terminals 50E and 50F. This will hotwire the immobilizer and make sure that it always activates when turning the key.

Drive around with the wire in place instead of the relay for a while to see if this helps. If it does you'll know that the problem is related to the alarm system. Keep in mind that you will be without alarm and therefore probably also without remote central locking while doing this.
Make sure that the wire is connected firmly enough so it doesn't come loose. You can also put a fuse on it if it makes you sleep better at night ;)

Good luck!

SOURCE: yellow up arrow light on 1994 volvo 850 instrument

The yellow arrow up light is telling you, you have a fault with the ride height control system usually a bad ride height sensor on the back axle

SOURCE: 1997 Volvo 850 no power to the fuel pump. I do

pull off the fuse box cover under the hood. held down with 4 T25 screws. Replace the red relay.