Question about 2007 Jeep Wrangler Unlimited Rubicon

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Check engine light with "gas cap" code is on and gas tank from time to time overflows after fill up. What could be the problem?

I bought a new gas cap from Jeep and replaced the factory one and cleared the code but the problem never went away and the light came back on.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Check Engine Light - Code numbers P1486 & P0455

Found on my jeep that the high quality vac line to the evap bottle had split on the under side.

Posted on Sep 03, 2008

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emissionwiz
  • 76848 Answers

SOURCE: check engine light code PO456

most likely the pressure sensor in the fuel tank for the evap system is defective.

Posted on Feb 26, 2009

emissionwiz
  • 76848 Answers

SOURCE: fix P1494 code

This code is caused by the leak detection pump for the evaporative emissions control system, this is a common fault in your year and model, there are factory bullentins about the code, to replace the pump do the following. As noted in the procedure pay close attention to the condition of the vacuum lines to the pump.


The LDP, (leak detection pump) is located in the left/front corner of engine compartment below the air cleaner housing. It is mounted to left/front inner fender sheet metal. The LDP and LDP filter are replaced (serviced) as one unit.

Posted on Mar 04, 2009

crayzeetrayn
  • 837 Answers

SOURCE: 2001 Jeep Grand Cherokee code P1391

I would check to be sure that the timing chain hasn't jumped at all ..

Posted on Mar 25, 2009

polarcycle
  • 1392 Answers

SOURCE: check engine light codes and troubleshooting

Sounds like you have a vacuum leak for the lean code and the misfires. I don't see a 473 code in my manual, but have a 463. The 463 is for the fuel level sensor open or voltage high.

Posted on Jun 02, 2009

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2 Answers

P0172 fault code


It could be an emmissions problem. Sometimes even the gas cap being loose can cause a code. Make sure to tighten the cap when done refuelling...you should hear repetitive clicks when its tight. Other components related to code p0172 are o2 sensor(bank 1) and catalytic converters. Hope this helps!

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Check engine light with "gas cap" code is on and gas tank from time to time overflows after fill up. What could be the problem?


You need to have the Evap System properly
diagnosed, to find any issues ,never install parts
to resolve any vehicle issues

You find the problems first

Any evap leak or loss of pressure, could set the gas
cap light
That doesn't mean it is the problem with the system

Jan 06, 2013 | Cars & Trucks

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Gas cap not tightening


Can't dismiss or second guess what you were told

Auto Parts Store counter people are not mechanics
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Check for codes,then diagnose

Test,test,don't ask questions

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Engine check light comes on and stays on for awhile then goes off. Dometimes when I fill the gas tank the check engine light comes on. is something to do with the gas cap or the instrument lights.


IF IT COME ON EVERY TIME YOU GET GAS.GAS CAP HAS BAD SEAL IT MORE LIKELY YOUR PROBLEM BUT LET AUTO ZONE SCAN IT FREE TO SEE WHAT TROUBLE CODE YOU ARE GETTING.

May 23, 2010 | 2003 Pontiac Bonneville

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The engine light comes on. When the gas tank is


Most likely an EVAP code. Need to scan it to get the specifics.

Jan 05, 2010 | 2005 Jeep Grand Cherokee

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Check engine keeps coming on, i dont see anything wrong with engine, but i have a locked gas cap and the last time i put gas in and sealed it back up the next morning the check engine light was gone


The fuel tank and lines is a pressurized system that is monitored by the computer and will set a emission code if there is a leak or you fill your tank with the vehicle running. 

Jul 18, 2009 | 2003 Chevrolet Cavalier

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Engine light comes on and off once in a week.sent to dealer and they change oxygen sensor ($350)didnt work.my regular service to dealer is done on time. I also top up my gas evry day to avoid condensa


Hi, first off don't ever top off your tank I don't know who told you to do this but this is a bad thing. This by itself will cause your engine MIL to come on most likely with a code PO455 large evap system leak. by topping off your tank you are installing a problem on your own vehicle what happens is as the gas heats up it expands normally there is enough room at the top of the tank to stop overflow, but when topped off it overflows into the charcoal canister and starts leaving a caron buildup in your granulated charcoal and will render it useless and a replacement will be necessary. also make sure you clean your gas cap off very well with alcohol. As this by itself can cause your MIL to turn on intermittently and set a PO442 small evap leak code.

May 28, 2009 | 2005 Honda Civic

1 Answer

Tighten Gas Cap Error Message


seems that your vent hose on the tank is plugged so the tank is over pressurrizing sending the error code and not allowing you to fill it all the way unclog the vent tube and this will solve the problem

Apr 18, 2009 | 2003 Chevrolet Suburban 1500

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