# Dodge Ram 1500 gas cap and c e l light

**URL:** <https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592>\
**Category:** Maintenance/Repairs\
**Created:** [April 10, 2013, 5:22am UTC](https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592 "2013-04-10T05:22:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![soonerincarolina](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@soonerincarolina](https://community.cartalk.com/u/soonerincarolina)\
**Post date:** [April 10, 2013, 5:22am UTC](https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592/1 "2013-04-10T05:22:49Z")

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I have a 2007 Dodge Ram 1500 4.7 V8 that the gas cap and check engine lights will not stay off. The gas cap was replaced with a factory gas cap. Smoke and vacuum checks showed no leaks. The lights can be reset but after a couple of days first the gas cap then the check engine lights come back on. Taking it to the dealer will cost $90.00 just to look at it. Disconnecting the battery did not help either. Any suggestions?

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**Author:** ![common-sense-answer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/common-sense-answer/32/716_2.png) [@common-sense-answer](https://community.cartalk.com/u/common-sense-answer)\
**Post date:** [April 10, 2013, 7:10am UTC](https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592/2 "2013-04-10T07:10:01Z")

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**_Many Major National Auto Parts Stores Will Read Your Engine Codes For Free In Their Parking Lot. Get Them Read And Write Them Down. Post Them Here._**

I will say that if you’ve got a DTC (diagnostic trouble code) P0456 (EVAP system small leak) and your truck was built on or between 01/26/07 and 06/18/07 then the condition could be caused by loose charcoal from a Fuel Vapor Canister.

A sticker on your driver’s door or door opening should have a mfg. (manufacture) date month/year. You can see if it is possibly within the range given.

Dodge/Jeep published a **3 page TSB** (Technical Service Bulletin) **#25-003-07** , pertaining to **2007 Ram Truck** , Durango/Aspen, Grand Cherokee, and Commander vehicles, to help their technicans diagnose and repair these vehicles.

There is a flow chart and procedures given in the bulletin, including a flow and smoke test.  
The fix for vehicles that require it is a new (revised part ?) EVAP Fuel Vapor Canister, EVAP fresh air hose, and EVAP fresh air filter. Part numbers are listed (different for 26 gallon tank or 34/35 gallon tank).

Get us the code(s). Check the mfg. date.  
Who did your smoke test and vacuum checks ?

_ **CSA** _

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**Author:** ![Big\_Marc](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Big\_Marc](https://community.cartalk.com/u/Big_Marc)\
**Post date:** [April 10, 2013, 4:29pm UTC](https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592/3 "2013-04-10T16:29:17Z")

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un hooking the battery does not shut off the cel you need a scan tool to do that

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**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [April 10, 2013, 5:05pm UTC](https://community.cartalk.com/t/dodge-ram-1500-gas-cap-and-c-e-l-light/78592/4 "2013-04-10T17:05:16Z")

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Most evap codes on Chryslers can be fixed by repairing cracked evap hose(s). Look over all the evap hoses closely and i’ll bet you find one with a crack.