The ECU has detected a problem with the emissions system. Have the ECU scanned with an OBD2 scan tool to retrieve the code that has been set. This code will tell you where to start looking for the problem.
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
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.
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.
Low fluid levels in engine.
If the check engine light on your 2002 Toyota Highlander is illuminated, it indicates that the vehicle's onboard diagnostics system has detected an issue. Common causes can include a loose gas cap, faulty oxygen sensors, or issues with the catalytic converter. It's advisable to use an OBD-II scanner to retrieve the error codes, which can help identify the specific problem. If you're unsure, consulting a mechanic for a thorough diagnosis is recommended.
If the engine warning light on a 2002 Toyota Highlander is illuminated, it indicates a potential issue with the engine or its components. Common causes could include problems with the oxygen sensor, catalytic converter, or ignition system. It's advisable to check for diagnostic trouble codes using an OBD-II scanner to identify the specific issue. Ignoring the warning could lead to more significant engine problems, so it's best to have it inspected by a qualified mechanic.
Go call the Toyota car company or headquarters and ask the people who made the car.
Yes, a loose or damaged gas tank cover can cause the engine check light to illuminate on a 2005 Toyota Highlander. This occurs because modern vehicles have an evaporative emissions system that monitors the integrity of the fuel system. If the gas cap is not sealed properly, it can trigger a fault in this system, leading to the check engine light turning on. It's advisable to check the gas cap and ensure it’s tightened or replace it if necessary.
To reset a check engine light for a Highlander 2003, disconnect the battery for 10 minutes. After this time, reconnect the cables.