Question about 2005 Dodge Ram 1500

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I have a 03 dodge ram 1500 and got the codes p0440 and p0441. changed gas cap. where are all the parts located

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P0441 - Evaporative Emission Control System Incorrect Purge Flow The "EVAP purge flow" faults are issues between the carbon cannister and the intake. The EVAP leak detection generally concerns the fuel tank to carbon cannister plumbing. A little background. The EVAP or evaporative emission system is a control system to keep vapors from evaporation in the fuel tank from getting into the atmosphere. The fuel tank is not vented, but rather the vapors are piped to the carbon cannister (usually located behind the pass. side front wheel) where the charcoal element absorbs the vapor. This is actually a vapor "storage" device. Under certain engine operating conditions, the ECU activates the Cannister Purge Valve (N80) which opens and allows the engine vacuum to **** the fuel vapors back out of the carbon cannister. This purges the vapor, allowing the cannister to absorb more vapor. This evap system has been on vehicles since the '70s. As part of the OBDII standard effective for 1996 cars and newer, it was mandated that leaks in the systems must be detected and reported as a fault which will set the Check Engine Light (CEL). To detect leaks, the system is pressurized by a pump so that leaks can be detected by a lack of appropriate pressure in the system. If there is a leak, such as a cracked vent hose, loose (or leaky) gas cap, poorly installed or defective O-rings on the fuel level senders on the fuel tank, etc. a code will be set. On the cannister to intake side, leaks are detected by deviations in the idle control system. If you have leaks in the lines from the carbon cannister to the intake, intake leaks, a defective purge valve, etc you will often get purge flow faults. My first recommendation is to closely inspect all the small vacuum lines connected to the intake manifold. The corrugated plastic lines are often the culprits, as well as the fabricate covered vacuum lines. Also consider replacing the gas cap.

Posted on Nov 10, 2009

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Fix evap purge flow code p0441 1997 dodge ram 5.2 engine


check to see if vacum line has a hole or has came loose from vacum gas ball.

Dec 05, 2014 | 1997 Dodge Ram

1 Answer

I have a 2003 dodge ram 1500 4x4 pu and have a p0441 code. i replaced the fuel cap but still no results.


On a Dodge a lot of times this light comes on because you are putting gas in the car or truck with it running, have someone with a OBD2 box clear the code and try this, when you open the gas cap with it running it sucks air and sets off the light due to a purge in the system. I hope this helps

Oct 07, 2010 | Dodge Ram 1500 Cars & Trucks

1 Answer

I have an 03 Ram 1500, engine light is on, I had


p0440 - Evap. system performance (this could be something as simple as not turning the gas cap several times after you fill up.

p0456 - Evap leak monitor Small leak detected. - Could be related to the previous code.

p2106 - Throttle Actuator Control System - Forced limited power : This one you might have noticed the vehicle running rough, overdrive not working properly and cruise control will not set.

p2175 - Throttle Actuator Control System - Low airflow detected.

What you might want to try first is have the codes cleared which most auto parts stores offer this for nothing (unless you have a programmer then you can do it yourself). Pour in some fuel injector cleaner into your gas, put a new air filter on. And when you fill up your gas tank, crank the cap several times when you put it back on.
See if the codes come back on after that.

Nov 21, 2009 | 2004 Dodge Ram 1500

1 Answer

Trouble code P0440


This indicates that a part of the EVAP control system is no longer functioning 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.

A 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
With 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

Nov 15, 2009 | 2004 Dodge Ram 1500

1 Answer

Dodge ram 4.7 p0440


Symptoms You likely won't notice any drivability problems.
Causes A 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 Solutions With 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

Jun 02, 2009 | 2004 Dodge Ram 1500

1 Answer

Check engine light on code p0441 dodge ram 1500 my 2007 dodge ram 1500 is puttering and acting like it wants to die out can you let me know what the problem is.


This trouble code is Evap Purge System Performance fault. 1) Check for a loose or missing fuel cap. 2) Check for a damaged or missing fuel cap seal. Recheck for other trouble codes. This fault wont cause the stumblering problem. It turns on the MIL lamp to say there leak in the EVAP system.

May 10, 2009 | 2007 Dodge Ram Truck

2 Answers

Check engine light on code p0441 dodge ram 1500


cheapest thing is get new gas cap, next make sure no vacuum leaks anywhere, the you may need to replace evap purge valve. these systems are junk on all cars and will make you spend lots of money.

Apr 24, 2009 | Dodge Pickup Cars & Trucks

1 Answer

HAVE A CODE PO446 1999 LEXUS GS300 CHECK GAS CAP AND IT WAS OK. WHAT DO I LOOK FOR NEXT AND LOCATION OF IT


P0446 is an evap code. Most likely, you need to change the charcoal canister vent valve (CCV) under the trunk floor. Fuel cap codes set 3 codes at once, P0440. P0441 and P0446, all at the same time.

Jul 23, 2008 | 1997 Lexus GS 300

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