Question about 2002 Pontiac Sunfire
The reason there is a P0440 = lare leak evap sytem. this can be caused be several things like a vent valve. which need to be close to check for leaks and if that stuck open this will set a p0440. or there is another problem. but i would start with a vent valve. there is a way to test it but you need a scan tool to do this. this is a common problem. 2734 GM Tech.
Posted on Oct 04, 2009
Its your o2 sensor (replace both) about 300-400
Posted on Sep 30, 2009
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