I got gas last week and then my SES light came on. I took it to my local auto parts store and used the code reader. The code that it produced was P0456. The guys at the store wasn't useful because he said it could be as simple as my gas cap needs replacing or a much bigger problem. Should I take it to the dealer or is it something I can fix myself?
View 1 RepliesRecently my 2005 scion tc CEL light came on and I diagnosed p0456. At the same time when I turn the car on in the morning it idles at 2k RPM for about 3 minutes and then the idle goes down to around 900. If I park and return to the car within 2 hours the idle stays down but if I wait it goes back to 2k and I have to wait a few minutes for it to come down. My question is whether this is related to p0456. What could be wrong and how do I fix it?
View 2 RepliesMy 2005 Mustang w/ 4.6L is giving a P0456 code and also won't let me fill it with gas completely. I think I've narrowed it down to the canister vent or purge valve. Looking for narrowing down which would cause the gas fill issue.
View 7 RepliesMy wife drives a 2004 2WD Explorer with the 4.0 SOHC motor. We have had a problem now for over a year and a half of it randomly dying. There is not telling when the engine might die besides the fact that it happens when you let off the accelerator to brake or make a turn. It only happens at slow speeds. At a stop light or stop sign usually. The car will always start right back up. It has been to a couple of Ford dealerships and they haven't been able to diagnose the problem. The check engine light is on and it is giving the code p0456. This code definition is an EVAP small leak detected. Probable causes for the code are:
1. Defective, loose, or missing fuel cap.
2. EVAP Canister broke, hose cracked or not connected.
3. Purge or vent solenoid defective.
4. Vacuum leak at engine.
I don't think it's the fuel cap that would be making the car die. I used carburetor cleaner (I know its not the safest ) and sprayed on the vacuum lines that I could find to try and diagnose a vacuum line leak but nothing seemed to effect the engine. Do one of the other probable causes from p0456 could be causing the dying or could it be something else???
Check engine and VSC lights came on wife's car, took to dealer, they hooked up computer and now stating that the Evap system has a leak. They want to replace the Charcoal Canister and they are quoting $900.00.
View 5 RepliesSo my car's emission systems light came on last Saturday and after work today I took it to the local Auto Zone to have an onboard diagnostic done to see what the code was, as some friends had recommended. I have a 2004 Ford Taurus with about 146,000 miles on it. It came back as only one code, P0456, which according to the clerk meant one of four things.
1.) Defective, loose, or missing fuel cap
2.) EVAP Canister Broke, hose cracked or not connected
3.) Purge or vent solenoid defective
4.) Vacuum leak at engine
I asked him if there was anyway to eliminate a few of these, but he wasn't sure and said I would have to take it to a dealer or a repair shop (which I expected). I was wondering any tips or tricks so I can eliminate a couple of these, and also if this is a five alarm fire I should be panicking about. I did call my Dad and he did not seem overly concerned about it. Plus my car is still running fine and the light has remained steady and not flashing. My friend at work suggested I put a piece of black electrical tape over it and ignore it, but I want to be sure it passes inspection in September.
At roughly 140,000 miles, my wife's '07 Santa Fe GLS has thrown a P0456 code. Does this code on a Santa Fe common?
It is "evaporative emission system leak detected (very small leak)." The good news, I guess, is that it is 'very small.' However, being small may make it more difficult to detect.
I have a 2005 1.8 TJetta GLI owned for about 2 months now. Gas cap warning pops up then goes away when I turn off the car then check engine light comes on. I've change the gas cap to new oem one changed the purge valve [URL] .... After a couple of weeks same issues again brought it to my mechanic he ran a leak detector and told me that there are Evap leaks. I read somewhere that I might need a need charcoal canister and a fuel tank.
View 12 RepliesI have a P0401 code that just fired today. I tried to clear the code, but it came right back on the drive home. There are no drivability symptoms so far; just the CEL.
It looks like the DPFE sensor is part of the EGR valve on this model. Do the 401 code usually means that the EGR needs to be changed, or if there are other common causes of this code that I need to check? The DPFE sensor fixed the same issue on my Escape, but that was an easy $34 and 30 seconds repair. Looking for some 2004+ year owners' experience (I guess 2002 and 2003 models had the DPFE?).
4.0L V6 engine
I have a 2011 F-250 6.2l with a P0456 code. Is there a common fix for this issue?
View 9 RepliesMy Jeep recently came up with a CEL after pumping gas sometime last week. It happened about an hour after so I did some research and they said one solution could be that my gas cap may be lose or needs replacement. I then removed and made sure the cap was secured properly. After about two days the CEL stopped showing up. I just took my Jeep to an AutoZone and was told that the reader was still detecting the issue.
View 9 RepliesMy CEL came on the other day, so I plugged in my scanner. It came up with P0456, saying "Evaporative Emission Control System Leak Detected (very small leak)."
I double checked the gas cap, and it was on correctly. I saw on an OBD code website that the repair urgency is low, but I'm not comfortable with a leak in my fuel system, no matter where it is.
I have a 2005 Sport trac, just recently, I started my truck and my check engine light was on and my trip counter and odometer went blank, not off, just dashes going across the panel. I recall noticing that my rpms were a little high. I turned off the truck and restarted and after a few minutes it came back to normal. Check engine light went off and my miles were displayed again.
A few days later, it happened again, except this time the rpms were normal, just the dashes and check engine light. I happened to have an obd II with me and I immediately scanned it for any codes. NONE. Few minutes later, back to normal. Scanned again, NOTHING. Its been happening more frequently now, every time i turn on the truck when its been sitting for a while. Like I said, it takes about 3 minutes or so and it goes away. Nothing unusual happens during this time. Motor sounds fine and runs smooth.
A friend who is a mechanic told me that it could be a ground cable for the COIL? that could be loose or damaged? He said its more than likely a ground because it happens when its cold and takes time to warm up and goes away. That if it was a hot it would happen all the time. I have searched online for something similar and have found similar problems but no exact match. I just changed the motor about a week ago. I had problems with the timing chain and broken oil pump.
Due to the amount of damage, cost and time to repair and amount of miles on the truck (180K) I decided id be better off putting in a new(used) motor with 67K miles in half the time for labor. I dont think this makes a difference though, because the first incident happened about a week before the truck broke down and the second about two days before. So Im guessing that the change of motor has nothing to do with it.
My girlfriend just bought a 98 XLT AWD 4.0. does have a few problems.
First, the brake light is on (on the dash). all the lines are good, but the front pads need to be changed. if i take off hard, the brake light goes out for a bit.
Second, had a CEL. P0743, torque converter clutch circuit blah blah. also, the o/d light flashes constantly.
The trans shifts fine, even under WOT. also goes into o/d with no problems, and the button works.
I just recently had my cel come on and i scanned it when i got to work.. I've noticed that since I've owned the car which is only about 2 months I get this loud clicking sound from the passenger rear? If I am not mistaken I believe one of the evap control valves is located on this side.
View 5 RepliesI have an 05 explorer with advance trac (which the sensor is bad for) and my abs light came on and my 4x4 light flashes. I read a lot about the tone rings and the speed sensors could be bad, but would they cause the truck to engage 4x4 when going slow and the 4x4 seems to be sticking/grinding. Something doesn't seem right and I'm not sure if its this sensor issue or if my transfer case is bad... We also just replaced a hub/bearing on the drivers front about 2 months ago.
View 3 RepliesI have a 2010 Sanata with 69500 miles. I have been getting a P0456 code for some time. I have replaced the gas cap, purge valve and the close vent valve and filter. The code still wont fully erase and keeps tripping the MIL. I have done a smoke test and there are no visible signs of leaking anywhere. What this could be.
One question I have in live data the purge valve never seems to go below 2.7 percent even when the engine is off. it was like that be for and after replacing it.
Could this all be caused by a bad ECU? I was told that in a 2010 Sanata that the ECU is common to fail. When the MIL is on I have 3 of the same code one freeze frame one that triggers the light and one that says permanent. Every time I erase the codes all but the permanent go away. No matter how many times I hit erase or even disconnect the battery it will not go away but the light shuts off.
Wife's car had a check engine light this morning, code is PO456, small evap leak, I took gas cap off cleaned the filler neck and solenoid the gas cap seal, and reset the light. I filled her car up on Sunday (2011 Sonata 2.4 80000 miles). Where to go next if light comes back on? Purge valve ?
View 9 RepliesI parked my Camry and returned to find a small puddle, and a gas smell. Sure enough it was still dripping (45 minutes later, and made a small puddle 3'x2' on the blacktop)
I have had P0456 code come on sporadically in the 3 months I have owned the car, never seen this puddle. Not sure how to best tackle this one. I shot a short video of it. [URL] ....
What I'm looking at/for? Seems to be dripping from a black plastic accordion hose (cover).
I have a 2006 Sonata with 88,000 miles on it. Currently, and for the past 11 months, the CEL has been on and the code always returned is a p0456, very small evap leak.
I searched for leaks but couldn't find any. I also replaced the purge control valve, but the same p0456 continues to reappear. Of course I also made sure the gas cap was on tight.
I received a coupon from the dealer for a free diagnostic so I took the car in.
The dealer reported the code as p0455, large evap leak, and said the cause was a cracked fuel pump housing. Cost to repair $850. Seems to me the dealer just picked the most costly part to replace, although I can confirm they looked at it because they forgot to screw the access cover back on.
So what I would like to know is how the dealer would have made such a diagnosis? I cleaned and inspected the outside of the pump and saw no crack, but I also understand that the crack may be too small see.
I want to be able to confirm that the dealer's diagnosis is correct, but how can I do that? I have a hand operated vacuum pump and access to shop air to aid in the diagnosis.
I read elsewhere on this site about pressurizing the system and putting soapy water on the area to show bubbles where the leak is, but where would I connect the air hose? And more importantly, what is a safe pressure to use?
Of course tracking down the cause of p0456. I know the charcoal canister could be problem as well, but I'd like to find some way of isolating down the failing component.
My 2007 Sonata continues to throw a P0456 code, small evap leak detected, gas cap is tight, getting ready to check the evap hoses. The question I have is the evap system covered under the emissions warranty at all ?
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