it means you need to check the engine
must be a oxygen sensor
The easiest way to reset the 2001 Toyota check engine light is to remove the check engine light fuse. The fuse can be found in the fuse box.
The gas cap was loose on my '04 Sienna. How's that for simple...
It is important to pay attention and understand why the warning lights come on. The Check Engine light will flash because there is in issue within the cars engine, the number of flashes usually indicate the code number.
Remove the battery head(+v) for a while, then replace it and star the engine.
When the light comes on it's telling you to read the engine diagnostic codes.
How To Fix vsc,trac off and engine light on for 2009 Toyota Sienna
i have check engine light on code po171 system to lean i changed o2 sensor check engine light came back soon after, i heard that it could be fuel air ratio sensor,where is it located on 6cyl Toyota sienna, do you have any input thanks tony
After repairing the cause for the code, you can clear code with a scan tool.
Problem with the emissions system.
If the check engine light is flashing the engine is misfiring. Most likely a bad ignition coil.