One problem related to check engine light on has been reported for the 2002 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Toyota Highlander based on all problems reported for the 2002 Highlander.
The engine oil light was coming on when braking. I had recently had the oil changed. The engine was also emitting a white smoke when starting the car. Oil was showing about 1/2 quart low on initial inspection. It took two trips to the dealer for them to finally discover internal oil gelling. No information was given by the dealer about previous problems with this vehicle and engine gelling.