Leak Detection Pump P1495 LDP - JeepForum.com

 
LinkBack Thread Tools
post #1 of 15 Old 09-19-2006, 08:36 PM Thread Starter
AzSun
Registered User
 
Join Date: Dec 2003
Location: Virginia
Posts: 16
Leak Detection Pump P1495 LDP

Has anyone else had this trouble code and what was the fix? I have a 1999 GC Laredo. I checked the fuses with a light probe, they are good. Dealership said it was a harness prob and $600 for the part and another $400 to install. I think thats a scam. I wish I had schematics. Anyone else have the same trouble?

AzSun is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 09-19-2006, 11:42 PM
kentman
Registered User
 
kentman's Avatar
2006 XK Commander 
 
Join Date: Jan 2004
Location: Wilmington, NC
Posts: 1,437
Garage
I had this code before on my ZJ. I took the pump apart and cleaned out the filter. I reassembled, cleared the code, and it has never come back in over a year.

'06 XK Limited, 5.7L, QD II, Black, 155K
'02 WJ Overland, 4.7L HO, QD, Inferno Red, 118K
kentman is offline  
post #3 of 15 Old 09-20-2006, 01:24 PM
Double E
2000 Laredo V8
 
Double E's Avatar
2000 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 4,697
Kentman, exactly what pump is the error referring to?

Thanks.

2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Double E is offline  
post #4 of 15 Old 09-20-2006, 01:31 PM
Arkansas_WJ
Registered User
 
Arkansas_WJ's Avatar
 
Join Date: Aug 2005
Location: Arkansas
Posts: 2,302
P1495 (M)
Leak Detection Pump Solenoid Circuit
An open or shorted condition detected in the Leak Detection Pump (LDP) solenoid circuit.

Mitch

2000 WJ Limited - 4.7l, 4x4, pioneer HU w/ ipod interface, upgraded front calipers, yakima lowrider system, uniden cb w/ 4 ft firestick, 3.5" tweeter upgrade
Arkansas_WJ is offline  
post #5 of 15 Old 09-20-2006, 02:59 PM
Double E
2000 Laredo V8
 
Double E's Avatar
2000 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 4,697
Yeah the additional code data is great ...however, I think the code information is not real specific and was hoping Kentman (or another with practical data) could elaborate.

Where is this pump, what does it do...detect leaks? ...of what?

The filter that may actually be at issue...what is it for and made of? How does it get cleaned?

The error means it found a leak ...or that it is no longer working, disconnected...etc.?

Thanks again in advance....

2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Double E is offline  
post #6 of 15 Old 09-21-2006, 01:24 AM
kentman
Registered User
 
kentman's Avatar
2006 XK Commander 
 
Join Date: Jan 2004
Location: Wilmington, NC
Posts: 1,437
Garage
Since you have a WJ, and I have a ZJ, things are probably a little different. However, the general components should be roughly the same.

Below is a photo of the pump and filter for the ZJ.



I believe that the leak detection system is looking for leaks in gas vapor. Gas vapor leaks are not environmentally friendly.

The first thing that I would do is verify that your gas cap is on good and tight. Reset the code (either with a code reader or disconnection of the battery). If the code comes back after checking the cap, then you may want to look at the filter and the pump. They are pretty simple on the ZJ. I just washed the filter out with water. I took the pump apart and made sure that there were no parts that looked bound or broke. I reassembled the pump and ensured that all of the vapor lines were attached properly.

Also check that the electrical connections are good and free of debris.

After doing this and then clearing the code, the code never came back.

The filter looks just like a K&N type cone filter, only smaller.

The error means that there is something wrong with the leak detection system and not necessarily that there is a leak. If the system is not working, then you do not know whether you have a leak or not.

Tinker with it and see if you can find what is setting the code off. My tinkering resulted in the code disappearing permanently.

Talk to you later.

'06 XK Limited, 5.7L, QD II, Black, 155K
'02 WJ Overland, 4.7L HO, QD, Inferno Red, 118K
kentman is offline  
post #7 of 15 Old 09-21-2006, 07:06 AM
Double E
2000 Laredo V8
 
Double E's Avatar
2000 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 4,697
Nice work Kentman. Thanks!!!

2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Double E is offline  
post #8 of 15 Old 09-22-2006, 06:05 PM Thread Starter
AzSun
Registered User
 
Join Date: Dec 2003
Location: Virginia
Posts: 16
Thanks Kentman! This is great info. I will try this during the weekend and post how it turned out. I agree this code, P1495, means the pump cannot work for whatever reason and therefore a leak in the system cannot be detected. I think code P1494 is the one for a faulty gas cap or other leak in the evaporator system.
AzSun is offline  
post #9 of 15 Old 09-23-2006, 06:41 AM
Jarheadsjeep
Newbie
 
Join Date: Sep 2006
Location: SouthCarolina
Posts: 4
That's some good info Kentman!!!.....How's the troll hunting going?
Jarheadsjeep is offline  
post #10 of 15 Old 09-24-2006, 11:14 PM
Samuel2002
Registered User
 
Join Date: Nov 2005
Location: So. Cal.
Posts: 35
On my WJ the hose from the filter to the pump dry rotted and gave me the same code. I replaced the hose and erased the code, and it never came back.

Might want to inspect the hoses too while your working on it.

Good luck!
Samuel2002 is offline  
post #11 of 15 Old 11-05-2010, 06:00 PM
Bubba3200
Registered User
2002 WJ 
 
Join Date: Sep 2008
Location: NC Mountains
Posts: 948
On a WJ is the location behind the left rear wheel well??
Bubba3200 is offline  
post #12 of 15 Old 06-28-2013, 03:48 PM
particalzman
Registered User
 
Join Date: Jun 2013
Location: Supply
Posts: 1
Thanks Kentman!!! You rock I hadn't found enough information to start to track down the problem. For me what was wrong was that the small ridged vacuum line that runs from the intake straight down from the throttle. It has two small 90 vacuum nipples one one each end. The one that hooks to the engine had been getting worse and worse it got loose enough it popped off a time or two when I started it so replaced. You have to either go to dealer or the Help section at your local parts store. It was the 90 elbow at the bottom right behind the headlight on the drivers side. It was almost none existent and was not even hooked up. I took the new one off the engine and moved it down. FYI I forced the fresh air intake off without taking the air box loose. So if you have this code, and your elbow on the engine is bad I would plan on checking the second one too.

Thanks JEEPForum and all you jeepsters for all your info, input, and expertise!
particalzman is offline  
post #13 of 15 Old 05-20-2015, 08:33 AM
Tumbleweed1954
Registered User
2000 WJ 
 
Join Date: Aug 2013
Location: Anaconda, Montana
Posts: 92
2000 GC~ Had the P1494 light and a vacuum line had come of the intake manifold do to a dry rotted 90 degree elbow. Thanks for the insight guys!
Tumbleweed1954 is offline  
post #14 of 15 Old 05-20-2015, 08:41 AM
kg6mov
Hears the voices
 
kg6mov's Avatar
1996 ZJ 
 
Join Date: Nov 2012
Location: Cupertino
Posts: 11,137
Hey, this (ancient, dead) thread is from a time when the ZJ and WJ forums were one and the same. They have since been split off and the forum for the WJ (99-04 Grand Cherokee) forum is now here: http://www.jeepforum.com/forum/f310/

You would be best posting a new thread there as more WJ guys will see it. If you're lucky a mod may move this thread but we don't get a lot of mods around here.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
kg6mov is online now  
post #15 of 15 Old 05-21-2015, 08:52 AM
Tumbleweed1954
Registered User
2000 WJ 
 
Join Date: Aug 2013
Location: Anaconda, Montana
Posts: 92
Thanks, I didn't know
Tumbleweed1954 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
leak detection pump part number tpirocz ZJ Grand Cherokee Forum 4 06-13-2012 05:13 PM
Leak detection pump Y2KGCLIM ZJ Grand Cherokee Forum 1 08-12-2009 06:32 AM
Leak Detection Pump Switch vagator ZJ Grand Cherokee Forum 0 01-02-2007 05:43 PM
Leak Detection Pump(Reply Fast) DMiester129 ZJ Grand Cherokee Forum 2 09-26-2006 04:57 PM
help with code P-1494- leak detection pump askoop ZJ Grand Cherokee Forum 2 07-24-2006 10:32 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome