10-pcm p0440 code
Thread Starter
Melting Slicks
Joined: Oct 2008
Posts: 3,109
Likes: 30
From: Jacksonville Florida
10-pcm p0440 code
This code 10-P0440H code has shown up twice in a week. I cleared it Saturday and it came back yesterday.
It is not listed. Is it close to this code?
P0441 EVAP System No Flow During Purge.
What is it and what can you tell me about fixing the situation.
My wife put in Quicky Mart gas last fill up,where I always run Shell V Power. She did use 93 octane though.
It is not listed. Is it close to this code?
P0441 EVAP System No Flow During Purge.
What is it and what can you tell me about fixing the situation.
My wife put in Quicky Mart gas last fill up,where I always run Shell V Power. She did use 93 octane though.
Instructor
Joined: Aug 2007
Posts: 141
Likes: 0
From: Glen Cove New York
Forum member BYRONHUNTER posted this Jan 11th:
"DTC P0440 Description
The EVAP large leak test applies vacuum to the evaporative emission (EVAP) system and monitors vacuum decay. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the vacuum decay rate. At an appropriate time, the control module turns the EVAP canister purge valve ON (open) and the EVAP vent valve ON (closed). This allows the engine to draw a vacuum on the EVAP system. At a calibrated time, or vacuum level, the control module turns the purge valve OFF (closed), sealing the system, and monitors the FTP sensor input in order to determine EVAP system vacuum. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, DTC P0440 will set."
All that said, I don't know if it helps you.
"DTC P0440 Description
The EVAP large leak test applies vacuum to the evaporative emission (EVAP) system and monitors vacuum decay. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the vacuum decay rate. At an appropriate time, the control module turns the EVAP canister purge valve ON (open) and the EVAP vent valve ON (closed). This allows the engine to draw a vacuum on the EVAP system. At a calibrated time, or vacuum level, the control module turns the purge valve OFF (closed), sealing the system, and monitors the FTP sensor input in order to determine EVAP system vacuum. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, DTC P0440 will set."
All that said, I don't know if it helps you.
Thread Starter
Melting Slicks
Joined: Oct 2008
Posts: 3,109
Likes: 30
From: Jacksonville Florida
tighten gas cap. Like I said my wife was the last one to put gas in it. Funny She has the same problem with her SUV. I just told her about it and I got the third degree"well maybe you should just be the one to keep gas in the cars and we would not have these problems" LOL
Le Mans Master
Joined: Aug 2005
Posts: 5,375
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From: CA.
St. Jude Donor '13-'14-'15
P0442 (small leak ) is usually the code for a gas cap that is leaking or not on properly---a p0440 is a general EVAP code that may indicate something more----could be a cracked or broken EVAP vacuum line-sometimes in rainy weather water can get into the system and it will throw codes---check all the routng of the EVAP lines and look for problems--- there may be some elect. solenoids that trigger the system to purge---check all your fuses and look for any that say EVAP or emmisions----
Thread Starter
Melting Slicks
Joined: Oct 2008
Posts: 3,109
Likes: 30
From: Jacksonville Florida
thanks I'll look a little harder if the CEL does not go out soon. I did not clear the codes this time, should I, or should I let the general driving procedures take place and see if it goes out by itself.
1st Gear
Joined: May 2023
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Cheapest “Repair” of my life
tighten gas cap. Like I said my wife was the last one to put gas in it. Funny She has the same problem with her SUV. I just told her about it and I got the third degree"well maybe you should just be the one to keep gas in the cars and we would not have these problems" LOL
Race Director
Joined: Oct 2004
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