Still getting codes P0455 and P0442. I've replaced the Leak Detection Pump, Vent Valve, Oxy Sensors, fuel filler hose, crankcase tube, air temp sensor and OEM gas cap...all hoses checked and no cracks found...taking my 2002 DGC to dealer
AW

 

did you replace the plastic clamps with metal hose clamps? as for me when my was throwing all those codes. and i replaced the little hose under the air box. all the hoses on the leak detection pump under the steering rack by the charcoal canister.(really hard to get too) were swollen from power steering fluid leaking down on it. and it busted the plastic caps enough to throw the code. i replaced all my plastic caps. and that one hose.. haven't had the code come back in almost a year now..

 

yes, replaced three broken plastic clamps w/metal clamps...except for the crankcase hose which I replaced, no sign of any other damaged hoses or fluid leaks.

 

It will be interesting to find out what the dealer comes up with. Another possible source is the seal at the top of the gas tank.

 

Solved...replaced Vacuum hose from PCV valve to top of valve cover with OEM hose. OEM hose has larger opening on end connecting to the valve cover...hose costs $3.

 

on my 03 caravan , had smoked several times nothing found , yet a small evap leak an ck engine light . also I had replaced hoses on top and under the air filter box also replaced the purge solenoid valve located near the radiator. did my self did found some bad hoses. an replaced the old purge valve with new mopar part. it been on there for 14 yrs figured wounldnt hurt to replace. but still got the small evap leak an ck engine light back on. having been smoked two different times over the years and the test point cap taken off several times apparently it leaked there. but not detected because the smokers at the garages were testing there,and then screwing the cap back on missing that part. they would still pass the car on inspection but would have the same problem the next year. so I put some gasket sealant on the threads of the little cap ,just to see if light would cut back on again ,trying to cover all bases . well no light anymore problem solved . so always have the guys smoking the car remove and pull hoses off the purge valve to test may save a head ache.think I will remove the test point that has the little cap . so tests will be run from the hose off of the purge valve near the radiator ,if tested sometime down the road . my wife van thanks r bell

 

on my 03 caravan , had smoked several times nothing found , yet a small evap leak an ck engine light . also I had replaced hoses on top and under the air filter box also replaced the purge solenoid valve located near the radiator. did my self did found some bad hoses. an replaced the old purge valve with new mopar part. it been on there for 14 yrs figured wouldnt hurt to replace. but still got the small evap leak an ck engine light back on. having been smoked two different times over the years and the test point cap taken off several times apparently it leaked there. but not detected because the smokers at the garages were testing there,and then screwing the cap back on missing that part. they would still pass the car on inspection but would have the same problem the next year. so I put some gasket sealant on the threads of the little cap ,just to see if light would cut back on again ,trying to cover all bases . well no light anymore problem solved . so always have the guys smoking the car to pull hoses off the purge valve to test may save a head ache.i will remove that test point ,will make the smokers use the hose off the valve near radiator for the future ,wifes van thanks ronnie bell

 

on my 03 caravan , had smoked several times nothing found , yet a small evap leak an ck engine light . also I had replaced hoses on top and under the air filter box also replaced the purge solenoid valve located near the radiator. did my self did found some bad hoses. an replaced the old purge valve with new mopar part. it been on there for 14 yrs figured wouldnt hurt to replace. but still got the small evap leak an ck engine light back on. having been smoked two different times over the years and the test point cap taken off several times apparently it leaked there. but not detected because the smokers at the garages were testing there,and then screwing the cap back on missing that part. they would still pass the car on inspection but would have the same problem the next year. so I put some gasket sealant on the threads of the little cap ,just to see if light would cut back on again ,trying to cover all bases . well no light anymore problem solved . so always have the guys smoking the car remove and pull hoses off the purge valve to test may save a head ache.think I will remove the test point that has the little cap . so tests will be run from the hose off of the purge valve near the radiator ,if tested sometime down the road . my wife van thanks r bell

 

Hi All,
We have a 2001 Dodge Grand Caravan. It ran fine but had error codes P0442 and P0455. Since we were due for emissions, I had to get the issue fixed and codes cleared. Here's what I did:
Visually inspected all hoses - looked good.
Replaced gas cap.
Replaced EGR vent valve.
Verified EGR Purge solenoid was good.
Ran smoke test several times trying to find leaks - none detected.

After all that, it was still displaying the error codes. I finally took it to a mechanic and he validated my work / troubleshooting and concluded it was the Leak Detection Pump (LDP). He said it was the only thing left in the EGR system that could be failing. I picked up the pump from a local auto parts store (much cheaper than Dodge) and delivered it to the mechanic. He replaced it and 100 miles later, the Check Engine Light was still off! We passed emissions and the 4 weeks later, the light is still off.

Hope this helps some of you.

Regards,

-Jason