Does it happen a little bit after you fill up gas ? If so, read on..
The most common reason for the light to come on is if the gas tank cap is not properly tightened after filling up gas. This normally happens at gas stations when an attendant fills up gas. If air gets into the tank, it will complain like this.
You should open the cap and put it back on properly. It may take almost a week after that for the light to go off.
It is possible that a check engine light on a Toyota Highlander will come on if the coolant level is low. Usually, though, there is another light that will come on that says 'low coolant' on some older Toyota's.
Check your brake (stop) light fuse
Have vehicle scanned to determine the problem - usually in the emission control system,
Have vehicle scanned to determine the problem - usually in the emission control system,
start with engine off. press and hold that speedometer resetter while starting engine, check engine light will flash a few times then disappear.
I have a 2003 Highlander. Whenever I get the oil changed, the check engine light comes on within a couple of days. I finally figured out that there is a hose under the air filter case that gets disconnected when the filter is checked. Just reattach the hose and the light will reset after a few restarts of the engine.
Go call the Toyota car company or headquarters and ask the people who made the car.
To reset a check engine light for a Highlander 2003, disconnect the battery for 10 minutes. After this time, reconnect the cables.
For the Highlander 4 cylinders, it is on the Alternator side. To replace it, you have to take the alternator out and unscrew two bolds . Unless the engine is rebuilt, thermostat only replaced, most likely, when you rebuild the engine. check cooling tank and water hose leak first.
To reset the check engine light in your 2006 Toyota Corolla, you will need to attach the car to a diagnostic computer. This allows you to pinpoint the reason for the light coming on, select the correct sensor, and reset the light.
Disconnecting the battery cable for a few minutes will reset the check engine light. If the light comes back on you will have to get the issue fixed or it will keep coming on.
You need to flush the power steering fluid on a 2003 Toyota Highlander every two to three years. You should check the fluid levels weekly.