3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Vehicle: 1997 Dodge Ram 1500 5.9 4x4 ex cab short bed
Location: Rotonda West, Florida
I know this is an older thread but it is just what I have going on right now. Code p1491 and a blown #39 25a fuse ( a/c condenser fan motor relay ). will get fuse tomorrow and see if anything else acts up. however I have two questions my scanner says code p1491 is "mfg installed emission control system" also would this have anything to do with my heat/ blend door or something acting up...NO HEAT. if so that would be great 'cause I dont wanna tear into this dash! and this is on my 02 3rd gen
Last edited by seabass202; 01-13-2010 at 05:17 PM..
wow!! a fella that used the search function before posting a new thread ...I give you a big AT-A BOY on this one ...come on guys lets help him out....i know he is a 2nd genner maby this can be moved over their fo support??
I'm having the same problem, has anyone successfully fixed the issue?
02 Ram 1500, 4.7 automatic, almost 167k miles
Check engine light is on. Fan was not working and fuse 39 was blown. Replaced the fuse, swapped the relay, and cleared the CEL. Now the fan works, but the CEL stays on with the same p1491 code. I've read about other issues with the wiring inside the fuse box corroding. Think this could be related? Open to suggestions.
well once everything is fixed and changed, did you do a code erase, to see if it comes on again or not? Ive had issues like that where all it needed was a refresh on the codes, and things went back to normal.
this happened to me and i checked all fuses and relays. i did notice however that the fuse was hot to the touch and replaced it anyways. the same thing happened when i put in a new relay, so i disconnected the fan and the relay cooled down, so then i took my power probe and put it to the fan a low and behold the fan wasnt accepting the current therefore making the relay hot. new condesor fan assemmbly, 48.00 bucks shiped. took the old one apart and the motor has some burnt windings in it, so know i have extremely cold ac.thought that might help a lil
The CEL came on yesterday morning. I scanned for the code, then did a quick Google search. That's where I found info about the fuse and relay. This morning I changed the fuse, swapped the relay, then I cleared the CEL. I started the truck and the light was out with the fan working. Went to lunch and the CEL came on as soon as I started the truck. Fan still works and the fuse isn't blown. This is why I'm confused, everything is working but p1491 code is thrown. I'll try clearing the code again and if that doesn't work I'll investigate the motor.
Thanks for the ideas guys, ill post back if I find anything else.
Yeah, my truck threw this code yesterday. Gonna replace the fuse and see whats up. I might add the fan was replaced 2x already. Once under warranty, once at a reduced price. I hate to think I gotta do it again. Will start with the fuse.
Anyone remember the on/off key pattern to get the code to show up in the digital mileage area?