Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 3rd Gen Ram Tech
Sign in using an external account
Register Forgot Password?


3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Gas Cap Light

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 04-30-2008, 10:58 PM
dedogg's Avatar
dedogg dedogg is offline
Record Breaker
Garage is empty, add now
 
Join Date: Mar 2008
Vehicle: 2014 Hemi Crew Cab 4X4
Location: North Carolina
Posts: 1,437
Default Gas Cap Light

Anyone out there ever get a gas cap warning come on in their truck. I have on 08 1500, and today the warning came on, I unscrewed the cap and nothing. I turned the truck off and unscrewed the cap and put it back on, started the truck and the warning was still there. Anyone know what the deal is. Dont tell me I have to go to the dealership to have them turn it off, cause that sucks at $4.00 a gal. Thanks for any help you can give me.
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 05-01-2008, 12:29 AM
07 Ram TRX4 07 Ram TRX4 is offline
Captain
Garage is empty, add now
 
Join Date: Jul 2007
Location:
Posts: 736
Default RE: Gas Cap Light

"Gas Cap" light? I've never heard of one... Sure you are not just running out of gas?
__________________
Reply With Quote
  #3  
Old 05-01-2008, 12:34 AM
dedogg's Avatar
dedogg dedogg is offline
Record Breaker
Garage is empty, add now
 
Join Date: Mar 2008
Vehicle: 2014 Hemi Crew Cab 4X4
Location: North Carolina
Posts: 1,437
Default RE: Gas Cap Light

plenty of gas. The message appears on the instrument panel, same place where it tells you your door is open or change your oil
Reply With Quote
  #4  
Old 05-01-2008, 09:27 AM
MikeHTally's Avatar
MikeHTally MikeHTally is offline
Champion
2006 Chrysler 300
My Garage
 
Join Date: Aug 2007
Vehicle: 2003 1500 QCSB Hemi 4x2
Location: N. Florida
Posts: 4,385
Default RE: Gas Cap Light

You can get a code reader to turn the lamp off. I've read it'll go away by itself in a day or so. Mine threw the code once. I had not tightened the cap, so it complained. I used my code reader to erase the code.
__________________
2003 1500 QC Hemi

2006 Chrysler 300C
2008 1/2 Mazda Speed3
Reply With Quote
  #5  
Old 05-01-2008, 10:50 AM
KC9JVC KC9JVC is offline
Rookie
Garage is empty, add now
 
Join Date: Jan 2008
Location:
Posts: 81
Send a message via AIM to KC9JVC Send a message via Yahoo to KC9JVC
Default RE: Gas Cap Light

I don't know about a gas cap light (my mother-in-law's explorer has one though.) I just played the game with my 02 Ram with the check engine light coming on throwing the evap code, after having the code cleared at at autozone I tightened the gas cap and prayed. No luck, a few days later it came back on.

Long story short after paying the dealer $120 and sitting in their waiting room for two afternoons, they found that the gas cap was bad and that I had a hose that was cracked all to hell. I hate that evap system...what a waste of time and money.
__________________
2002 Dodge Ram QC 4x4
3.55 Open Differential
5.9L 360 ALL STOCK!!
110,500 miles and counting
Reply With Quote
  #6  
Old 05-01-2008, 05:36 PM
Foiled Foiled is offline
Veteran
Garage is empty, add now
 
Join Date: Jan 2007
Posts: 301
Default RE: Gas Cap Light

This is new. They added this because people was getting check engine lights because of the loose or missing caps. So they added a gas cap light so people know what it is.

Read the manual and see if it has special instructions about this light, if that does not work then I would it in. If the cap is on and the light is still on then there may be a problem with your tank.
__________________
2006 Dodge Ram HEMI QC "Big Horn" in Brilliant Black
LineX Spray in Liner, K&N Filter, Wheel Well Liners, Recon White Lightning, Superchips, 91 Performance

1996 Dodge Avenger ES
2004 Lincoln LS V8 "Ultimate"
Reply With Quote
  #7  
Old 05-02-2008, 08:32 PM
toxic609 toxic609 is offline
Garage is empty, add now
 
Join Date: May 2008
Posts: 1
Default RE: Gas Cap Light

yea i have that error, i'm not sure why its on, i've had it on for two weeks now, i've gotten many fuel ups and it hasnt come off, i plugged it into an OBDii senor and it comes up as a leaking vaccume line, thats probably what yours is, i just deleted the error, lol i dont know if that was the best decison but its what i chose
Reply With Quote
  #8  
Old 05-02-2008, 09:02 PM
Wrechin2 Wrechin2 is offline
Garage is empty, add now
 
Join Date: Dec 2006
Posts: 16
Default RE: Gas Cap Light

Fuel cap loose P0457. Your truck has a evap leak detection sytem that the pcm monitors the fuel tank for leaks OVERNIGHT. This is called natural vacuum. When the tank is hot it expands and when it cools the tanks will "suck" in and close the switch on the ESIM. The pcm knows that the night before it had no leak, Then next night it seen a different fuel level and now it has a leak and it assums that you left the cap off. Put the cap on and it should go off the next day or two. Make sure you don't make a short trip as it will not justify the pcm to monitor the evap system. I have had some rental cars come in with that code and found they have jumped railraod tracks and cut evap hoses with the suspension. Hope this helps!
__________________
James Perry
Reply With Quote
Old 05-02-2008, 09:02 PM
 
 
 
Reply




Tags
1500, 2008, avenger, cap, chrysler, dodge, error, esim, gas, gascap, p0457, ram, switch, warning

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 01:22 AM.

Internet Brands, Inc.


Contact Details & Emails

Search Engine Friendly URLs by vBSEO 3.5.2