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To begin resetting the maintenance required light on your 2003 Toyota 4Runner, start by inserting the key into the ignition and turning it to the ON position. Then switch to the trip display and select ODO mode before turning the ignition off. Press the reset button on the trip meter, and then turn the ignition back on. Your light should now be cleared, and you're good to hit the road. If you've already performed maintenance like an oil change but the light is still on, you may need to reset it. However, make sure to address any outstanding vehicle needs before resetting the light.
To clear the maintenance light on a 2003 Toyota 4Runner, follow these steps: Start by turning the ignition to the "on" position and switch the odometer/trip display to "odo" mode. Next, turn off the ignition and press and hold the trip meter reset button while turning the ignition back on. You will see the service maintenance reminder light first illuminate solidly for 3 seconds, then blink for 2 seconds, followed by another solid illumination for 1 second before turning off. Release the trip meter reset button, turn off the ignition, then turn it back on to make sure the maintenance reminder light is no longer on.
The check engine or maintenance light on the 2003 Toyota 4Runner is a general warning signal that indicates a problem with the vehicle. It illuminates when the vehicle's computer detects an error and stores a trouble code. You can use an OBD scanner to retrieve this code, which will help identify the issue, such as a loose gas cap, engine misfire, worn spark plugs, vacuum leaks, low oil pressure, or other problems. The light may also turn on as a reminder to schedule a service appointment when you're approaching a milestone. While the check engine light is usually not a severe issue, it shouldn't be disregarded. To reset it, you must address the underlying problem that triggered it.