Since Volvo introduced the S80 model in 1998, this Swedish luxury car won awards for its attractiveness as well as for its safety, reliability and quality. While driving your Volvo S80, you may see a trouble code light come on as the check engine light, warning you of a car engine part that needs to be repaired or replaced. You must read the trouble codes, and then reset the trouble code alarm of your Volvo S80.
Turn your Volvo ignition switch to position "II" without running the engine.
Open the hood of your car and locate two diagnostic sockets near the center of the washer fill cap. Find a connector labeled "A" with a jumper stored in the "A" diagnostic connector lid. The connectors have numbers 1 through 7.
Place the jumper into the "A3" connector, and then push in the black button located next to the "A" for one second.
Count the blinks of the red LED indicator light. This light will blink a few times, pause, blink a number of times again, pause and then blink once more. Count each series of blinks between the pauses, which will represent a three-digit trouble alarm code, such as 2-3-5, which represents missing rear wheel sensors, or 4-4-4, which means no power going to the hydraulic unit valves.
Press the black button for one second again to get the next trouble alarm code. Read all of the trouble codes of your Volvo S80 before resetting them. When the trouble codes begin to repeat, you know you read all of them.
Reset the trouble codes by pushing the same black button, holding the button in for 6 to 7 seconds and then releasing the button.
Push and hold the button in again for 6 to 7 seconds immediately after the LED comes on.
Push in the button for 1 second and reread the codes. Look for 1-1-1, which means no trouble faults.
Turn the ignition to the "Off" position, then start your Volvo S80. Drive your car around. You should no longer see the check engine light come on. If the trouble alarms return, you know you may need to replace parts in your car. Take your car into your Volvo service technician to check out the trouble codes you have.
