Exhaust leak engine trouble light

Tiny
DUUGAN
  • MEMBER
  • 2010 JEEP WRANGLER
  • 3.8L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 92,000 MILES
When the engine starts, an engine light appears on the dash. When I have had it diagnosed, it indicates a minor exhaust leak. I have replaced the gas cap with an OEM (Mopar) gas cap for my model of Jeep and it still persists. Shortly after the engine runs a little, the engine light dims but remains on.
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Sunday, October 8th, 2017 AT 8:01 AM

26 Replies

Tiny
CJ MEDEVAC
  • EXPERT
So,

What was the exact code number? (Example, p0171)

The Medic
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Sunday, October 8th, 2017 AT 8:12 AM
Tiny
DUUGAN
  • MEMBER
The technician who hooked up the diagnostic reader did not tell me what the code number was.
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Sunday, October 8th, 2017 AT 9:16 AM
Tiny
CJ MEDEVAC
  • EXPERT
Can you go back over to Auto World and have them scan it again?

Better still, Get you own scanner.

Cheaper ones are available.

Is not like your vehicle/family/friend's is going to change from OBD II anytime soon.

This would make you the hero when theirs started acting up!

Waiting on more information.

The Medic
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Sunday, October 8th, 2017 AT 9:58 AM
Tiny
DUUGAN
  • MEMBER
The exact code number is p0456. I am not physically able to do a lot myself. I am a 100% disabled, combat wounded, Vietnam veteran with limited mobility. I have to depend on others for assistance.
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Monday, October 9th, 2017 AT 10:02 AM
Tiny
RENEE
  • ADMIN
Hello DUUGAN,

All of us here at 2CarPros want to thank you for your service and your sacrifice. It is hard to express just how much we appreciate you and all of the men and women serving or have served in the military. Thank you does not seem enough. With that said thank you from the bottom of our hearts.

Sincerely,

The 2CarPros Team.
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Monday, October 9th, 2017 AT 12:27 PM
Tiny
KEN
  • ADMIN
That code is for a small leak in the EVAP system. This is usually caused by a hose or tube has come off or has a split.

Here are a guide that will help you get the problem fixed or at least give you an idea what needs to be done:

https://www.2carpros.com/articles/evap-system-code-repair

and

https://www.2carpros.com/articles/how-emission-control-systems-work

Please let us know what happens so we can continue helping you.

Cheers, Ken.

Thanks again for your service!
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Monday, October 9th, 2017 AT 12:37 PM
Tiny
CJ MEDEVAC
  • EXPERT
Thanks for getting the code, there are lots of them, many can be related to the same parts/problems. Having the code can narrow things down.

I can possibly get vacuum diagrams if you need them.

Keep us posted.

The Medic
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Monday, October 9th, 2017 AT 3:05 PM
Tiny
DUUGAN
  • MEMBER
I would greatly appreciate the vacuum diagrams so I can see the parts that make up the system. While I trust my mechanic, who I have used in the past, I like to take your comments and suggestions with me when I go to take the Wrangler to him. If I can afford the parts that make up the entire EVAP system, I would probably have him change the system out rather than him replacing part by part until the problem is remedied.

The last time you helped me was when I had the Park-No Start condition. Jeep wanted to charge me an arm and a leg for a part that was not necessary. The problem was the Jeep's four year old battery! I really enjoy consulting you guys for your expert assistance.
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Monday, October 9th, 2017 AT 3:52 PM
Tiny
STEVE W.
  • EXPERT
EVAP parts. Common leak points on these are the ESIM valves and the purge solenoids stick. Unless you live in a rust belt state, then the lines get pinholes, five minutes on a smoke machine and the leak should show up.
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Monday, October 9th, 2017 AT 7:14 PM
Tiny
DUUGAN
  • MEMBER
I live in Central New Mexico. Our average annual humidity is 16%. Thanks. Come payday and I will take my Jeep to the mechanic and show him what you guys have suggested. The Jeep is our "baby", and we' have driven it through tornadoes and other horrible weather only to come out unscathed! We feel helpless when "baby" cries and we cannot understand its sobs! LOL
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Tuesday, October 10th, 2017 AT 8:12 AM
Tiny
KEN
  • ADMIN
LOL yep, please let us know what happens.
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Tuesday, October 10th, 2017 AT 10:56 AM
Tiny
CJ MEDEVAC
  • EXPERT
I get sa (strike that).

I get depres (strike that).

I have panic attacks/ angina/ almost go into a coma when one of mine has a boo boo!

We still have not seen yours yet!

Let's see a picture after you see the doctor.

The Medic
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Tuesday, October 10th, 2017 AT 3:26 PM
Tiny
DUUGAN
  • MEMBER
Finally got the smoke test performed on my Wrangler. The test revealed that the leak associated with code 0456 was at the rollover valve on top of the gas tank. I cannot find a replacement rollover valve, primarily because I don't know where to look (I'm old!) The mechanic told me that, when he touched the hose fitting, the valve broke off. I must assume he meant one of the three fitting arms of the molded roller valve where the hose attaches(?) He told me he does not know the name of the part nor where to find a diagram of it. He's not around to ask since this is elk hunting season in New Mexico! I went to the Jeep dealer in my home town, who is known for ripping off customers, and asked the Service Manager the name of the part. That is where I was told that it is the rollover valve. Where can I get a replacement for my 2010 Wrangler Unlimited Mountain?
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Saturday, December 2nd, 2017 AT 10:22 AM
Tiny
STEVE W.
  • EXPERT
I will guess he means the part number 1. It appears it is a part of the tank itself as I don't find anything to show a separate part number. 52059729AN is the part number for the complete tank, looks to be about $600.00 new. You might want to see if you can find a good used one. Or see if the stealership can get a replacement valve.
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+1
Saturday, December 2nd, 2017 AT 11:55 AM
Tiny
DUUGAN
  • MEMBER
I like your term: "stealership"! I checked with a Jeep stealership and was told that the rollover valves are/were permanently glued in place at the manufacturer, hence, there is no part number for them. I was quoted over $800 without any mounting hardware or labor! I'm retired and am on a fixed budget. I cannot do that amount without severly hampering my household budget! I The Chilton Jeep Wrangler 1987-11 Repair Manual shows the gas tank with the two rollover valves. Does that mean that any model of the Jeep Wranger between (and including) 1987-2011 has the same gas tank? If so, I'll research if there are any used parts places in Albuquerque to try and locate one.
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Monday, December 4th, 2017 AT 10:55 AM
Tiny
STEVE W.
  • EXPERT
The tank you need fits a 2007- 2017 Wrangler 4 door with 4 wheel drive.
52059729AN is the Jeep part number.
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Monday, December 4th, 2017 AT 3:07 PM
Tiny
DUUGAN
  • MEMBER
Thanks, Steve. I guess I'll go on a parts hunt after the Holiday Season.
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Monday, December 4th, 2017 AT 4:18 PM
Tiny
CJ MEDEVAC
  • EXPERT
What exactly broke off?

Just the plastic nipple that the hose goes over?

Or further back into the body of it?

I reckon a pic would be too much to ask?

Vee haf ways!

The Medic
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Monday, December 4th, 2017 AT 5:16 PM
Tiny
DUUGAN
  • MEMBER
I really don't know if it was a hose nipple or what! The mechanic was leaving on an elk hunt so I didn't get any further info. I did start looking for the rollover valve but couldn't find it as a standalone part. I'm told that it's on top of the fuel tank housing, inside the right rear fender well.
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Monday, December 4th, 2017 AT 7:19 PM
Tiny
CJ MEDEVAC
  • EXPERT
I was maybe looking at the possibility of chopping off the nipple (in a decent spot- if it could be done) Carefully drilling (maybe tapping)/ epoxying in a threaded brass/ plastic replacement nipple.

As I said/ implied, if it will work, enough room with what's left, if the damage is not further into the valve. It Cannot interfere with the workings of the valve!

Brass hose fittings come in various hose sizes and also different other ends ranging from pressed fits to straight threads or National pipe threads, even metric stuff.

Basically the valve is a vent for the tank which closes if the tank becomes somewhat upside down in a mishap. You just need a good seal which would still allow the check valve to operate and the vent still work as it should. But only if this repair is feasible.

Just a thought,

The Medic
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Monday, December 4th, 2017 AT 7:40 PM

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