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2004 Dodge Intrepid EVAP Code P0442

Tiny
ROQUE71
  • MEMBER
  • 2004 DODGE INTREPID
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 114,000 MILES
I have the code P0442 for evap leak, I allready take the car to a shop and they did not fiend a leak and also say the selenoid works fine, what else need to be check to find the problem?
Thursday, November 5th, 2009 AT 9:39 AM

11 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
There is intake manifold vacuum leak
actually, the code says"small leak" when actually it is big.
A faster technique for finding intake manifold vacuum leaks is to get a bottle of propane and attach a length of rubber hose to the gas valve. Open the valve so you have a steady flow of gas. Then hold the hose near suspected leak points while the engine is idling. If there is a leak, propane will be siphoned in through the leak. The resulting "correction" in the engine's air/fuel ratio should cause a noticeable change in idle speed and/or smoothness, spray around the intake, ruber connection.
If your mechanic have a scan tool, I'm sure he does, look at the Short Term Fuel Trim (STFT) value while you are using carb cleaner or propane to check suspected vacuum leak points. If there is a leak and some of the cleaner or propane is sucked in through the leak, you will see a momentary drop in the STFT reading. This confirms you have found a leak (keep checking because there may be multiple leaks!).
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Thursday, November 5th, 2009 AT 3:06 PM
Tiny
ROQUE71
  • MEMBER
  • 3 POSTS
Thanks for your answer, but why the check engine light stay on for a week and go off for other week and allways is the same code?
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Monday, November 9th, 2009 AT 9:29 AM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Evaporation system leak monitor is an intermittent monitor.
Check for charcoal canister malfunction
EVAP hose damage or loose
Cracked fuel tank
poorly sealed fuel tank or poorly accessories attached on fuel tank such as fuel gauge.
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Monday, November 9th, 2009 AT 11:06 AM
Tiny
ROQUE71
  • MEMBER
  • 3 POSTS
One last question, where can I find a diagram or pictures of the component for the evap for Dodge Intrepid 04

thanks
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Monday, November 9th, 2009 AT 6:20 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Hello roque71
I have something here that can help.


https://www.2carpros.com/forum/automotive_pictures/46384_purge_solenoid_1.jpg


follow hose connected to the solenoid, it will lead you to the canister.


https://www.2carpros.com/forum/automotive_pictures/46384_solenoid_1.jpg

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Tuesday, November 10th, 2009 AT 12:58 AM
Tiny
PETERSENROGER02
  • MEMBER
  • 7 POSTS
So I need help I dont know what to do to figure this out any further I know a little when it comes to cars but I try to stay away from shops if I can do things myself they r just too expensive. I have changed the map sensor and tps sensor it has been running good but I've had a engine code on for bout a month and a half saying small evap leak so I thought it was no big deal. The other morning I went to start it and it wasn't even drivable I am posting a video of what it was doing I let it run for a minute or so like this to try and look things over to see what the deal was I really wasnt sure so I turned it off went back inside Googled some things went back out and started it up and it was completely fine. What the hell can anyone please help and tell me how this is and what it is I'd really appreciate it
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Sunday, November 10th, 2019 AT 10:32 AM
Tiny
PETERSENROGER02
  • MEMBER
  • 7 POSTS
I forgot to put this is an 04 intrpid 2.7 liter
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Sunday, November 10th, 2019 AT 10:34 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Couple things. Check to see if the check engine light has any other codes. If this happened one time it may be hard to figure out without any codes. Next, this surging is normally idle control so I am wondering if the throttle blade was stuck or binding. When you replaced the TPS did you clean the throttle bore?

https://www.2carpros.com/articles/throttle-actuator-service

After that we need to check for a vacuum leak. However this is unlikely if it ran fine a couple minutes later.

Let's start with what codes are in the PCM and a throttle service and go from there. Thanks
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Sunday, November 10th, 2019 AT 2:18 PM
Tiny
PETERSENROGER02
  • MEMBER
  • 7 POSTS
KASEKENNY1,

I had two codes come up when it started doing that weird deal in the video I uploaded.

P0068 MAP/MAF throttle position correlation

p0121 throttle/pedal position correlation/switch A circuit range / performance

It also slightly pauses kind of weird on the take off now only when I stop and give it gas to go again just a little mild pause if that makes any sense. I'm hoping this will help to maybe give me something solid otherwise I'm about to clean the throttle bore as you suggested this weekend and then not to sure where to really go from there. Also when it first starting running like that in the video I smelled a gas odor pretty bad at first. If that helps with anything. Also please let me know if you can further help me I appreciate it.
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Tuesday, November 19th, 2019 AT 8:06 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay. Let's get a new post started with this information. We need to keep this to one issue per post because others won't find this issue under an EVAP heading and this is not an EVAP issue. Your issues are related to the codes so we need to fix those. Post a new question and I will look for it and send you the tests for it. Thanks

https://www.2carpros.com/questions/new
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Wednesday, November 20th, 2019 AT 8:48 PM

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