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#286519 - 11/08/03 01:08 AM FUEL--Code P0455 - Loose Gas Cap
Iceberg Offline

Registered: 06/30/02
Posts: 266
Loc: Colorado
A few days ago I had a mandatory emmissions inspections on my '99CV at the local state (Colorado) run emissions station. Part of the inspection involves removing the gas cap and attaching a device to the gas cap which determines if the gas cap leaks. The vehicle passed the inspection OK, and I paid my $24.25 and drove off. I drove the vehicle for four days without a "Check Engine" light, but today the "Check Engine" light illuminated. I bought an Innova Model 3100 Code Reader (very nice device) and retrieved the code (P0455). I then did a search on this forum for code "P0455". The search retrieved four posts, one posted by PatFromJersey on 10/24/02 with the subject "Check Engine Light = Loose Gas Cap". I went out to the garage and looked at the gas cap. Guess what? The knucklehead who checked my gas cap during the emissions inspection forgot to tighten the gas cap.

Well, I always wanted a good code reader anyway. The search engine on this web site works great. Thanks!!!

Edited by Liquid (11/09/04 04:45 PM)

#286520 - 11/08/03 01:10 AM Re: Code P0455 - Loose Gas Cap
Kinger87 Offline


Registered: 12/15/02
Posts: 7624
Loc: Gladstone MI
lol good job!
"Responding to a question by saying do a search, look in a auto parts catalog, or call a mechanic isn't being helpful"

2003 Grand marquis all stock

#286521 - 11/08/03 01:14 AM Re: Code P0455 - Loose Gas Cap
Crownvicman289 Offline

Registered: 07/22/03
Posts: 5395
Loc: Colorado Springs, CO
wow, OBDII must be the cats ass to tell you your gas cap is loose.

'92 P74 w/5.0 HO/GT-40P/T5 swap and bolt ons. '02 CVPI cut front springs/swaybar/brake swap, rear HPP bags/sway.

15.92@89mph, 2.4 60', 4700' elevation, 5500' DA.

#286522 - 11/08/03 01:18 AM Re: Code P0455 - Loose Gas Cap
SteveS Offline

Posting Addict

Registered: 05/16/01
Posts: 16396
Loc: Groveland, MA
The idea is to reduce evaporative emissions. So, it will notice if there are any leaks, including when the gas cap is loose.
**Boston SmartTraveler road unit 473**

#286523 - 11/08/03 01:47 AM Re: Code P0455 - Loose Gas Cap
14secondP71 Offline
hillbilly car crusher
Over the Hill

Registered: 04/06/02
Posts: 2754
Loc: Jackson,MI
WOW... you went 4 whole days without putting gas in your car... wish i could do that.
-Brandon... resident dragstrip junkie
Project:QwikVic ...nitrous fueled '96 P71 14.5 @ 96 mph... *SOLD*

current vehicles:

2003 F-350 Crew Cab long box Sport package 7.3L Powerstroke (daily driver/tow rig)

1979 F250 Std. Cab long box, 351M, C6, 8" of lift(offroad toy)

1972 Mach 1 Mustang 351C completely restored, 40,000 original miles

#286524 - 11/08/03 01:51 AM Re: Code P0455 - Loose Gas Cap
purelux Offline
Over the Hill

Registered: 09/02/02
Posts: 2831
Loc: Pennsylvania
Ironic that a test to check for leaks from the gas cap left a leak after passing the car.
1998 Lincoln Towncar, fordchip tuned ecm, steeda under drives, stainless dual freeflow exhaust H pipe, 3.55*h/d-posi(s-spring),+1 clutch mod, royal purple diff fluid, bendix front rotors & ceramic pads, upper and lower moog ball joints, edelbrock ias all around. 21mm marauder rear sway bar, rear blacknight poly/graphite sway bushings, ENS rear endlinks, Mobil 1 synthetic oil, power steering fluids, amsoil synthetic atf fluid, valvoline synthetic brake fluid. Optima red top battery, ens greasable front sway bushings. Chrome 99 cartier rims. Freeway blaster horns and hella horns (all 4). Meziere electric water pump. Contential extreme trac 245/50/v16's/(summer)215-65-16T Pirelli scorpion ice&snow(winter). ADTR intake with heatshield.

#286525 - 11/08/03 05:37 AM Re: Code P0455 - Loose Gas Cap
97_GM Offline

Registered: 10/27/01
Posts: 65
Not so ironic, considering how much they pay those 'assistant' boys whose only job is to remove and reinstall your gas cap while you are in line for the inspection. It's almost certainly a minimum wage job. I saw the guy in operation, and even though he told me not to step out of the car, I removed the gas cap from the tether and handed it to him, because I was sure that he would tear it off or break the key (it's one with a lock). And I did not wait for the CEL after the inspection either - pulled off into the first gas station along the way and checked - sure enough it was loose. Here they charge $15 for the emissions inspection, and it has to pay the rent, maintaining the equipment, and doing all the paperwork. And you get a free re-inspection if you failed the first time.

#286526 - 11/08/03 12:07 PM Re: Code P0455 - Loose Gas Cap
wchain Offline

Over the Hill

Registered: 03/17/01
Posts: 1958
Loc: Houston, TX
P0455 is defined as a Gross leak in the Evaporative Emssions System, caused by a faulty Gas Cap Seal, otherwise you need to check for damaged vac lines, usually when I see a P0455, the culprit in most Ford Vehicles, if not a Gas Cap, is a Evap Purge SOlenoid....
'15 F250/'05 E55/'97 FZJ80/'14 Santa Fe TurboDiesel AWD (China Ride)

#286527 - 11/10/03 01:45 AM Re: Code P0455 - Loose Gas Cap
Dirt820 Offline
Resident Alcoholic

Registered: 02/02/02
Posts: 5432
Loc: Machesney Park, IL

WOW... you went 4 whole days without putting gas in your car... wish i could do that.

when i worked one job, i put gas in the car somewhere during the first week of every month...if it needed it or not. that 10 miles/week really didn't rack up much on the odometer, but i sure used an enormous amount of fuel for such short distances.
I always wanted to be somebody, but I should have been more specific.
Lily Tomlin

#286528 - 11/10/03 10:00 AM Re: Code P0455 - Loose Gas Cap
Blue_Q Offline

Registered: 08/02/02
Posts: 499
Loc: Woodbridge, VA
10 miles/week??

Let's see: divided by 5 days, that equals about 1 mile per direction. You don't have a bicycle?

2003 Dark Pearl P73
New and improved!! Now with 3.73 Ford Motorsports gears, Auburn Pro limited-slip differential, and Qchip Technologies performance chip.
(Reload this page for a different picture)

#286529 - 11/10/03 11:25 AM Re: Code P0455 - Loose Gas Cap
Iceberg Offline

Registered: 06/30/02
Posts: 266
Loc: Colorado
Hey guys. When you are retired like me, you don't do a whole lot of driving!!!


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