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what causes the light to come on
Depends on which engine warning light you are referring to. If you are referring to the Check Engine light then have the problem repaired that caused it to come on in the first place. They will reset the light. Resetting the light without repairing the problem and it will just come back on.
The check engine light on a 2003 Honda Accord will be triggered when something on the engine is malfunctioning. To rid the check engine a light the ECU will need to be reset.
vss sensor
It has come on because there is a problem with the Anti-Lock Brake System (ABS). Seek professional help.
The low traction light comes on in the 2003 Buick Century if the road is icy or if the road is wet. This is a warning light to let the driver know to slow down. If the light is coming on for no reason, the tires might be the problem. Bald tires can cause this light to come on.
incorrect resistance of light bulbs installed. causes electrical feed back. replace all bulbs with factory replacement Also check that the tail light ground is ok. If the tail light bulbs aren;t grounded, it causes a backfeed of power to the dash lights and causes them to turn on.
what causes the battery light to on a 2005 ford expedition to come on?
Yes, that is one of many things that can cause the light to come on.
It comes on when a malfunction has been detected by the engine computer. You need to have the codes read to know possible causes.
motion of anything
The license plate light on a Lexus may turn on and off if there is a loose wire. Try wiggling the wires around and see if the light goes on and off. If it's not a loose wire then the light bulb may have come loose and needs to be tightened.