Problem Reports
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2003 Toyota Highlander Problems
Check Engine Light Due to Hose Off of Air Filter Housing
When changing the air filter, it is easy to knock off a hose on the air filter housing, which is part of the emission control system. If the vehicle is driven with this hose disconnected, the Check Engine Light will illuminate.
Airbag Light Due to Problematic Center Airbag Sensor
A problematic center airbag sensor can cause the airbag malfunction light to illuminate.
Check Engine Light Due to Hose Off of Air Filter Housing
When changing the air filter, it is easy to knock off a hose on the air filter housing, which is part of the emission control system. If the vehicle is driven with this hose disconnected, the Check Engine Light will illuminate.
Misfire and/or Check Engine Light Due to Failed Ignition Coil
On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
Check Engine Light Due to Failed EVAP Purge Control Valve
Intermittent failure of a purge control valve in the evaporative emission system can cause the Check Engine Light to illuminate. A failed valve should be replaced to correct this problem.
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