To reset the check engine light on a Pontiac Sunfire, you can disconnect the negative battery terminal for about 15 minutes, then reconnect it. Alternatively, using an OBD-II scanner to clear the error codes can also reset the light. Make sure to address any underlying issues that triggered the light before resetting it to avoid recurring problems. Always consult your vehicle's manual for specific instructions related to your model year.
If a check engine light is flashing that means an engine cylinder misfire has been detected
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Unhook battery cables (both) for about 5-10 minutes. Then rehook. This may reset the system. If problem persists, then the CEL will come back on.
The check engine light has nothing to do with an oil change. The check engine light is reset with a scan tool after repairing the failure that caused it.
it probably needs an O2 sensor they range from about 40-90 dollars
Reset with an OBD2 scan tool, after the repair of whatever triggered the light.
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after the cause of the code is repaired, you reset with a scan tool, or by unhooking the battery.
check if your battery is low than usual ..might be alternator problem
camshaft sensor - signal low could be that or check the wiring to it. Other possibilities MAF or TPS
You mileage will vary dependent on the condition of your car, your driving habits and which engine/transmission you have. Check the web site below for exact specs. http://consumerguideauto.howstuffworks.com/1995-to-2005-pontiac-sunfire-6.htm