Question about 2003 Ford Expedition
The code may go away by itself after a few restarts. You can also try clearing the code by taking the vehicle Auto Zone, Advance Auto or another chain parts place and using their loaner scanner to complete the task.
Posted on Apr 13, 2009
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Posted on Jan 02, 2017
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Illuminates when the ignition is switched on. It should extinguish as soon as
the engine starts.
If it illuminates with the engine running, it indicates a malfunction with the engine management system. Have this checked as soon as possible.
If it flashes when driving, reduce the vehicle speed immediately until the light illuminates constantly. If it continues to flash, avoid heavy acceleration and high engine speed, stop the vehicle and have it checked immediately.
On some vehicles this light may be red - again stop the vehicle and seek assistance.
If it is safe to do so, try stopping the vehicle, switching off the engine, wait two minutes, then restarting the engine to reset the engine management system.
With the light illuminated, the vehicle is still safe to drive as long as no other faults are apparent with the engine. Have the vehicle checked by a dealer or garage as soon as possible to avoid any damage being caused to the catalytic converter
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