The engine light flashes when the computer has detected a problem and set a code. The code can be read for free at most auto parts stores and they can tell you what may need to be replaced to fix it.
The check engine light is flashing due to a problem with the emission system. I flashing check engine light usually indicates a random engine misfire.
it should be checked out by a qualified person only.
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Have vehicle scanned to determine the problem
A flashing check engine light is due to a condition that is causing catalytic converter damage. Normal cause is a severe misfireA flashing check engine light is due to a condition that is causing catalytic converter damage. Normal cause is a severe misfire
If your 2005 Nissan Frontier has a full tank but the fuel indicator shows empty and the service engine light is on, you may need the computer or the "brain" reset or replaced. You can take the truck to a garage or to the Nissan dealer to have this done.
It's controlled by the ECM, not by a fuse.
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There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
P0303 : misfire cylinder #3
If the check engine light is flashing that indicates an engine cylinder misfire has been detected
If the check engine light is flashing when the engine is running , that indicates that an ignition misfire has been detected