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Old 05-30-2007, 09:45 PM   #1
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Diagnostic Trouble Code??

Diagnostic Trouble Code (DTC) P0441
DTC Definition: EVAP Emission Control System Purge Flow Fault

Can any one tell me what this is, where it is, or how to fix it?? It set off my check engine light whatever it is..
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Old 05-31-2007, 09:44 AM   #2
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Re: Diagnostic Trouble Code??

P0141 - HO2S Sensor Circuit Malfunction (HO2S-125) See DTC P0135

P0135 - HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S.
Water in harness connector.
Open VPWR circuit.
Open GND circuit.
Low battery voltage.
Corrosion or poor mating terminals and wiring
Damaged HO2S heater.
Damaged PCM.
Wiring.
Damaged HO2S heater.
Damaged PCM.
also that eVap code can be set off by a loose gas cap believe it or not. Check yours to make sure it is tightened properly, reset the code, and see what happens.
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Old 05-31-2007, 10:09 AM   #3
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Re: Diagnostic Trouble Code??

I got that code one day when we were sitting at a bank in one degree heat for half an hour. Reset the code and it went away.
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Old 05-31-2007, 06:54 PM   #4
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Re: Diagnostic Trouble Code??

Thank You,
I reset the code yesterday drove all over town today and it hasnt went off so hopefully it was nothing important.
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Old 06-03-2007, 08:41 PM   #5
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Re: Diagnostic Trouble Code??

Did your car run like crap when the code was set?

If it's the same code mine used to throw, have fun. It'll come back with a vengeance.
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Old 06-03-2007, 10:33 PM   #6
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Re: Diagnostic Trouble Code??

Yupe same code just came up again. The car runs fine though
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Old 06-03-2007, 10:49 PM   #7
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Re: Diagnostic Trouble Code??

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What does that mean?This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

SymptomsYou likely won't notice any drivability problems.

CausesA code P0440 could mean one or more of the following has happened:

The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly
Possible SolutionsWith a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks
I typed in my code into this trouble code site and this is what it had to say, about the P0440 series codes which refers to P0440,P0441,P0444. Exact problem for my code which is P0441 is: P0441 : Evaporative emission control system incorrect purge flow
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