Question about 2001 Dodge Ram 1500 Truck 2WD

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Check engine light stays on

2001 dodge ram check engine lights stays on. I have had it tested and it is a small emmissions leak, alread changed the fuel cap, what else could it be?

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  • Anonymous Mar 10, 2009

    I had the same error code and found a small rubber hose to be cracked on the fuel vapor recirculation system up under the bed of truck. lay under the vehicle and run your hand up under were this system is positioned and trace the hoses with your hand -- don't forget to have the error code deleted from system...

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First have you had the codes ran off the computer? If not thats the first thing you should do. It has to be a sensor of some short that is throwing up the code. Take it to auto zone and have them do it.

Posted on Feb 25, 2009

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I have a 2001 hyundai sonata, I have a light that is coming on, in the manual it says gas, exhaust light, what is that?


emmission light.
there is a small vapour leak in the fuel sytem of your car.
this doesn`t mean your leaking liquid gas -only a small amount of fuel vapours.
the emmission system of today`s vehicle are very sensitive, and when the car`s computer monitors this, it will display this information thru your dash warning light.
yor car is still safe to drive, but eventually you will have to fix this problem in order to pass a drive -clean -emmission test. See your service repair shop for further diagnostics..

Feb 28, 2011 | 2001 Hyundai Sonata

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01 dodge ram 3.9 moter check engine light


A Large leak is almost never a gas cap, thats usually the small leak. Dodge uses cheap hoses that crack badly. Check the canister in the Engine compartment, passenger side. Then check passenger side behind the cab by the frame. 2 canisters and hoses leaving that ,often cracked. Last is a piece that connects from the hard steel lines near the oil pan....one of these three usually

Jul 22, 2010 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

Failed Emision test


po442 is evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.

Sep 01, 2009 | 2001 Dodge Caravan

1 Answer

Very small evap leak changed fuel cap what should i do next to 2004 dodge ram 2500 hemi check engine light keeps coming on


inspect all the hoses in the evap system dodge has some of the worst I'seen . it doesnt take much for a small leak to register. good luck

Aug 26, 2009 | 2001 Dodge Ram 2500 Truck

2 Answers

I have a 2003 dodge ram 1500 with a V-8 4.7 engine and my check engine light came on with a P0456 code and I have been told that it could be the gas cap, I have checked it and it seems fine but should I...


The leak in your evap system is very small at .020. It is more than likely a small split in a hose somewhere. The cap is probably ok, we rarely find a bad one. If it is a small split in a hose it will only get larger over time. Here is the factory info on the code. We have found that alot of these leaks are from a small hose on the evap canister under the vehicle, but with out looking at your vehicle it is hard to say. If the leak goes away or is no longer large enough to be detected, your light will go out after a few days. These leaks are emmissions related and will not effect the integrity of the vehicle. I would have it checked and corrected if the light stays on at your convienience.

Symptom List:
P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED
P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED
P0456-EVAP LEAK MONITOR SMALL (.020) LEAK DETECTED
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0442-EVAP LEAK MONITOR
MEDIUM (0.040) LEAK DETECTED.
When Monitored and Set Condition:
P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: If there is a leak larger than 0.0409 and smaller than 0.0809 in the
evaporative system.
P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: There is a leak larger than 0.0809 in the evaporative system.
P0456-EVAP LEAK MONITOR SMALL (.020) LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: There is a leak larger than 0.0209 and smaller than 0.0409 in the
evaporative system.
POSSIBLE CAUSES
LEAK AT GAS CAP
VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
VISUAL AND PHYSICAL INSPECTION
VERIFY EVAPORATIVE EMISSION SYSTEM LEAK
EVAP PURGE SOLENOID OPERATION
INTERMITTENT LDP MONITOR FAILURE
EVAPORATIVE EMISSION LEAK DETECTION
GAS CAP
LDP COMPONENT LEAK

Jun 12, 2009 | 2003 Dodge Ram Maxi

2 Answers

Trouble code P0442 on 2001 dodge ram 1500" what steps should i take to diagnose what the problem is?


P0442 means you have a small leak in your EVAP System. your can try replacing the Gas cap since it's the easiest thing to do and reset the check engine light with a scanner. If the check engine light came back on then your going to have to go though all the Vacuum line in the EVAP system and connections. The other thing too is the service engine light should turn off when the problem is addressed and it may take up to three start ups to clear. Good luck and keep me posted, be glad to help, Recap, change the gas cap and inspect all the hose and connection's to the EVAP system.

Jun 08, 2009 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

2001 dodge 1500 4x4


did you drain the fluid, it may have lots of metal and be really gummed up causing it to over heat and burn off. Aside from that the most commonly overlooked "check engine" proplem is the O2 sensors, there should be 2 of them

Dec 19, 2008 | 2001 Dodge Ram 1500 Truck 2WD

5 Answers

2001 Dodge Caravan/check engine light


P0442--Evap Emission Sys. leak detected small leak
P0455--Evap Emission sys. leak detected gross leak
P0456--Evap Emission Sys. leak detected very small leak

Jun 07, 2008 | 2001 Dodge Caravan

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