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spetre
New User
Sep 17, 2007, 7:19 AM
Post #1 of 3
(4055 views)
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engine fault code P0440
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have 2002 ponatic firebird with a engine fault code p0440 ( evaporative emission control system malfunction) any idle what might be at fault, this is a v6 engine
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Indytech
User
Sep 24, 2007, 6:15 AM
Post #2 of 3
(4037 views)
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Re: engine fault code P0440
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DTC P0440: EVAP SYSTEM - LARGE LEAK Description The control module tests the Evaporative (EVAP) emission system for a large leak. The control module monitors the Fuel Tank Pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets. Indy . , http://www.flatratetech.com staff tech Indy Shop owner
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way2old
Veteran
/ Moderator
Sep 24, 2007, 1:31 PM
Post #3 of 3
(4035 views)
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Re: engine fault code P0440
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By any chance was the vehicle running when the car was being fueled? Common mistake people make. Will cause the light to come on. Also the cheapest thing to do first is to replace the gas cap or lubricate the sealing O ring on the old cap. Then erase the code and see how soon or if it returns. Being way2old is why I need help from younger minds
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