Water Troubles? I checked all the fluid levels and the reservoir was down about a liter and a half. I filled it with water as it would have lots of antifreeze in it for this time of the year. Engine Troubles I checked the Gas cap and it seems fine. Where is the Mass Air Flow Sensor and how do I clean it.
What causes the water light comes on? What Causes the Engine light to come on? on 2003 Toyota Echo
by RAD-WRITER in Hillview, KY on April 12, 2012
ANSWER by csubak30 on April 12, 2012
The mass airflow sensor will be located on the air intake. Find your air filter housing and follow it toward the engine. Usually about 6inches to a foot past it. Remove the the bolts holding in with a security (holllow) starhead. Clean with MAF cleaner from a parts store and reinstall. Losing the amount of coolant that you are, I would suggest looking for a leak somewhere. Get the check engine code read at a parts store for free and post that result.