I have 1995 volvo 940. how do you reset the service light

Hello, You got to visit the volvo service shop near you to fix this issue. Your speedometer may be lost connection,only a service technician can be able to fix this.

I had the same problem and fixed it with only one nut to remove and one easy plug in part the Crankshaft Position Sensor is located between the firewall and the engine on the bell housing which connects the engine to the driveshaft Right on the top shine a light down in there and remove the nut to the left of the sensor sticking up and unplug it check the wires to see if they are rotted mine were all rotted and touching eachother went and bought the part at autozone for $55 plugged it in and it now works perfectly! hope this helps

1995 Volvo 940 2.3 liter Turbo L4 VIN 83




Hope helps (remember to rate and comment this).

this is one of the last cable operated speedos(straight out of the 740)just replace the cable.its probably the spigot on the end of the cable,known to break...

Service light comes on whenever the computer senses some problem with the engine, it can be a small problem with one of the sensors but it might also mean serious trouble. get the car diagnosed.

Black smoke points to unburnt fuel. I would start by replacing the spark plugs and wires if you have not done so in the last couple of years.

if you take your car to Autozone they can check for codes at no charge.

the switch rarely go.its usualy the relay located in the panel behind the ashtray.

Hopes this helps you.

Need new spark plug wires/cap/rotor.