What does it indicate when check engine light is on on a 2000 Volvo s 80?
the oxygen sensor(sensors)
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions. If the check engine light is flashing a misfire has been detected
If you mean the check engine light, the general answer is, it means you should take it somewhere that can check the error code. I don't know where you are, but in my city, Autozone will do it for free. The check engine light can indicate any number of things and anyone answering the question the way you asked it would be simply making a random guess.
Yes, but with the provision that there are no problems as seen by the car's computer. Disconnect the negative battery cable for a couple of minutes then reconnect. This will erase any trouble codes stored in the computer. If everything is okay, the CHECK ENGINE light will stay off. If the computer sees a problem, the CHECK ENGINE light will come on again.
The check engine light does not indicate your fluids are low. There are separate lights for that. The MIL (or check engine light) indicates there is a problem with your fuel injection, ignition, emmisions or engine and a DTC (or diagnostic trouble code) has been stored. Your best bet is to pull the codes to find out why the light is on. This is the only way you will correctly identify and fix the problem.
Many vehicles will trigger a check engine code if the engine never reaches its designated operating temperature (Such as if a thermostat was stuck open). However, there are hundreds of other reasons a check engine light can come on. Putting in a thermostat solely because the check engine light came on is a very bad idea. Any time that light comes on you should have the vehicle scanned by a trained proffessional (The guy at…