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What does a Flashing check engine light on 2003 F150 mean?

A flashing check engine light on a 2003 F150 means that there is a severe engine misfire that could damage your catalytic converter. You should stop driving the vehicle and have it towed to a mechanic as soon as possible.

Here are some of the possible causes of a flashing check engine light on a 2003 F150:

* Bad spark plugs or wires

* Faulty fuel injector

* Vacuum leak

* Timing belt problem

* Engine overheating

If you continue to drive the vehicle with a flashing check engine light, you could cause serious damage to the catalytic converter. The catalytic converter is an emissions control device that helps to reduce harmful pollutants from the exhaust. If it is damaged, it can cause the vehicle to fail emissions tests and may also make the vehicle unsafe to drive.

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