If the underlying cause of the light is taken care of the OBD check engine light will go off after 6 warm up/driving cyclec or one within 50 miles of highway driving at a steady speed. If its still on you still have the problem/malfunction.
You will have to install a catalytic converter to get the light to go off.
You may have a different code, the computer may not have been reset, the converter may not have been installed correctly, problem may not have been the converter in the first place.
A failed catalytic converter is one of hundreds of parts that can cause the check engine light to be on.
Disconnect the negative battery cable for 5 minutes. If that does not reset the Check Engine light you will need access to an OBD2 scan tool.
Cleaning a catalytic converter to reset an error code is only a temporary solution for a 1999 Grand Am SE. To clean the catalytic converter in this case you would need to gently blow out any build up with an air compressor. You would also need to replace or clean the oxygen sensor as well or the code will not reset.
This is a reminder light to tell you to remove the pellets from the catalytic converter, clean them, and put them back in. Yes, there is a reset button. You can safely ignore this light.
You cannot reset an O2 sensor, you can replace them though they are located on the exhaust pipe before and after the catalytic converter. You can then reset the computer with a scan tool but if the problem is fixed the light will go out on its own after a while.
catalytic converter
This light is indicating a emissions problem or failure. The catalytic converter may be operating at low efficiency which is a sign of failure.
After replacing the catalytic converter on a 2002 Chevy 1500 truck, you can reset the check engine light by disconnecting the negative battery terminal for about 15 minutes. This will clear the vehicle's memory and reset the check engine light. You can also use an OBD-II scanner to clear any stored diagnostic trouble codes. After reconnecting the battery or using the scanner, drive the vehicle for a short distance to allow the onboard diagnostics to recalibrate.
Check engine light, low power, poor fuel economy, highly illegal to run without the catalytic converter.Check engine light, low power, poor fuel economy, highly illegal to run without the catalytic converter.
Legally you can only replace a catalytic converter with another catalytic converter.