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Question posted by davidpcadle on October 18th, 2021

Why Does My Check Engine Light Stay On When My Ignition Is Off In My 04 Grandpri

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Answer #1: Posted by SonuKumar on October 19th, 2021 9:56 AM

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SonuKumar

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Is the check engine light supposed to come on when you turn the key on?

1 Answer. the check engine light will come on when you turn the ing. switch on. the light goes out when the engine starts.

How do you reset the check engine light on a 2004 Pontiac Grand Prix?

A few different ways to reset your check engine light are:

Let it go off by itself.

Turn your ignition on and off several times in a row.

Disconnect your battery and reconnect it.

Buy an OBD II scanner (they're relatively inexpensive) and follow the instructions (it's pretty easy)

What causes engine light to come on and stay on?

The check engine light may stay on steadily or it may flash when the vehicle is accelerated. This is very serious. There is a severe failure of the emission control system that is causing the engine to misfire to the point that the catalytic converter is damaged each time the check engine light flashes.

https://www.cargurus.com/Cars/Discussion-t14494_ds644097

https://www.kbb.com/pontiac/grand-prix/2004/check-engine-light/

Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.

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Sonu
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