Question about 2002 Pontiac Sunfire
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Posted on Jan 02, 2017
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
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5.Connect the new EVAP vent solenoid harness (3), P/N 22687059, to the EVAP vent solenoid (2), route the harness above the rear ABS harness (4) and connect the EVAP vent solenoid harness (3) to connector C313 (1).
6.Lower the vehicle.
7.Clear the DTC's with the Tech 2 scan tool.
If all of the wires are good you will want to check for any leaks in the evap system.
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