P 1494 code
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P 1494 code
I just got this code this morning after seeing the engine light come on after doing the 3 keyswitch on off trick,I think this is the leak detection error code for my 2001 dakota 3.9L,does this mean the leak detection pump needs replaced,and if so where can I get a replacement one? Anyone have similar problem and fix?
Last edited by 2001DodgeMan; Jan 26, 2011 at 11:45 AM. Reason: typed a 6 instead of a 9,doh
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From: Clermont, Florida
According to the 2001 Dakota Service Manual, P1494 means there is incorrect input state for the pressure switch inside the Leak Detection Pump. I would think this to mean yes the switch is bad and the LDP needs to be replaced. The manual is not always written in a pass/fail type of language. I had to read that section 3 times before I figured out what it is saying.
The LDP is a dealer part only. Around here they cost about $130.00. I replaced mine last year when it was damaged in a front-end collision. I had code P0441 which is a broad code for a list of about 6 or 8 different problems that can result in a leak in the evaporative emissions system. The LDP was one of the possible causes but I didn't want to spend $130.00 if I could not be sure that was the problem. I bought a used LDP off a "Cash for Clunkers" Dakota at a local junk yard for 20 bucks. I replaced the LDP and did a hard reset on my PCM by disconnecting the negative cable from the battery and holding the ignition key in the start position for 30 seconds. The code has not come back on since, and that was back in April of last year.
The LDP is mounted to the bottom of the battery tray. You have to remove the battery and partially remove the Power Distribution Center to get it up out of the way and move the evap system hoses out of the way, then remove the bolts from the battery tray. Unplug the battery temperature sensor from the bottom of the tray and then you can work the tray out of the truck, disconnect the LDP hoses and electrical connector and remove the three 5/16" screws holding the LDP in place on the bottom of the tray. It's not nearly as difficult as I make it sound.
While you are at it, now would be a good time to replace the evap hoses under the hood. I did mine with 7 feet of rubber fuel line hose from Advance Auto Parts. I replaced the smaller diameter hoses leading back to the larger hard plastic hoses back behind and below the throttle body, a little ways down the firewall. There is one larger diameter emissions hose there, I left it alone, it is also a dealer only part and mine looked to still be in great shape.
I also replaced the little right angle hoses at the evap purge solenoid. That is the little round solenoid in the corner of the engine compartment between the side of the battery and the left front headlight. The fuel hose and right angle fittings cost me less than 15 bucks at Advance. It's also very good idea to get under the truck and check the hoses leading from the charcoal canister in front of the gas tank to the hard plastic hoses that lead up to the engine compartment. Those 2 curved hoses and the rest of the emissions hoses on Dakota's are sort of known to crack and split, which will set a code for an evap system leak.
It has been nearly a year since I replaced my emissions hoses and LDP, and I have had no emissions codes since (knock on wood). I posted here when I was working to figure out what was wrong and fix my truck:
https://dodgeforum.com/forum/2nd-gen...591-p0441.html
Hope this helps you out.
Jimmy
The LDP is a dealer part only. Around here they cost about $130.00. I replaced mine last year when it was damaged in a front-end collision. I had code P0441 which is a broad code for a list of about 6 or 8 different problems that can result in a leak in the evaporative emissions system. The LDP was one of the possible causes but I didn't want to spend $130.00 if I could not be sure that was the problem. I bought a used LDP off a "Cash for Clunkers" Dakota at a local junk yard for 20 bucks. I replaced the LDP and did a hard reset on my PCM by disconnecting the negative cable from the battery and holding the ignition key in the start position for 30 seconds. The code has not come back on since, and that was back in April of last year.
The LDP is mounted to the bottom of the battery tray. You have to remove the battery and partially remove the Power Distribution Center to get it up out of the way and move the evap system hoses out of the way, then remove the bolts from the battery tray. Unplug the battery temperature sensor from the bottom of the tray and then you can work the tray out of the truck, disconnect the LDP hoses and electrical connector and remove the three 5/16" screws holding the LDP in place on the bottom of the tray. It's not nearly as difficult as I make it sound.
While you are at it, now would be a good time to replace the evap hoses under the hood. I did mine with 7 feet of rubber fuel line hose from Advance Auto Parts. I replaced the smaller diameter hoses leading back to the larger hard plastic hoses back behind and below the throttle body, a little ways down the firewall. There is one larger diameter emissions hose there, I left it alone, it is also a dealer only part and mine looked to still be in great shape.
I also replaced the little right angle hoses at the evap purge solenoid. That is the little round solenoid in the corner of the engine compartment between the side of the battery and the left front headlight. The fuel hose and right angle fittings cost me less than 15 bucks at Advance. It's also very good idea to get under the truck and check the hoses leading from the charcoal canister in front of the gas tank to the hard plastic hoses that lead up to the engine compartment. Those 2 curved hoses and the rest of the emissions hoses on Dakota's are sort of known to crack and split, which will set a code for an evap system leak.
It has been nearly a year since I replaced my emissions hoses and LDP, and I have had no emissions codes since (knock on wood). I posted here when I was working to figure out what was wrong and fix my truck:
https://dodgeforum.com/forum/2nd-gen...591-p0441.html
Hope this helps you out.
Jimmy
Last edited by 01SilverCC; Jan 26, 2011 at 04:31 PM.