2002 Dodge Ram--P1491 fault code

atv_babe · 09-24-2004, 07:21 PM

Can anyone help me figure out what this code is and how to fix it wihtout paying big bucks? We took the truck to autozone and they scanned for the code. P1491 is what they came up with but said it was an OEM code and couldn't tell us anything else. All help is appreciated.

moparboy99 · 09-24-2004, 09:21 PM

check and make sure you gas cap is on tight

Dman2003 · 10-02-2004, 08:49 PM

Did you fill the tank with the motor running

hotrod314 · 10-10-2004, 10:03 AM

Quote:

Originally Posted by atv_babe

Can anyone help me figure out what this code is and how to fix it wihtout paying big bucks? We took the truck to autozone and they scanned for the code. P1491 is what they came up with but said it was an OEM code and couldn't tell us anything else. All help is appreciated.

I had the same code and same prob i found the code was for my a/c condensor fan i found my fuse was blown. i put a new fuse in and dissconnected the battery for a min and the code went away that was my prob maybe it will help u.

atv_babe · 10-10-2004, 01:27 PM

Thanks for the replys. We had the Dodge dealer hook it up. It was the a/c fan and a fuse.

Dodgepower76 · 11-13-2004, 07:08 PM

hey I have the same problem with that code.. I got 2 different sayings.. one person said it was Radiatior relay switch and then the other person said it was a Secondary Switch Solenoid Circuit Malfunction. So what is the deal? Any ideas? thanks

jrmcx · 11-14-2004, 08:08 AM

Don't know if this helps

http://autorepair.about.com/library/...bl399a-lib.htm

hundahunta · 11-14-2004, 01:26 PM

p 1491 cooling fan radiator relay circuit!

kaliman198117 · 01-08-2006, 08:57 PM

Quote:

Originally Posted by Dodgepower76

hey I have the same problem with that code.. I got 2 different sayings.. one person said it was Radiatior relay switch and then the other person said it was a Secondary Switch Solenoid Circuit Malfunction. So what is the deal? Any ideas? thanks

I have the same problem but can anyone tell me what the hell es Secondary Switch Solenoid Circuit Malfunction? i mean i don't know if is a a/c because i don't even use it. Any help would be appreciated i did got the code p1491 on the scanner but i have no idea what to do. Somebody help me please, and thank you

Stevo2 · 01-15-2006, 03:53 AM

P1491

SYMPTOM
P1491 - Radiator Fan Control Relay Circuit

POSSIBLE CAUSES
An open or shorted condition detected in the radiator fan control relay control circuit. This includes PWM solid state relays. The manufacturer doesn't provide any further information regarding this code.

NOTE: This vehicle is not equipped with Radiator Fan Control Relay, however the vehicle does have a Condenser Fan Relay.

http://dodgeram.info/tsb/2002/08-015-02.htm

1thunder · 01-15-2006, 11:00 AM

there is a service bulletin for this problem #08-02-03 consists of replacing condensor fan shroud & motor and reprograming the pcm if not done fuse will burn out randomly worst in cold weather

ringlett1 · 08-18-2006, 01:40 PM

Quote:

Originally Posted by hotrod314

I had the same code and same prob i found the code was for my a/c condensor fan i found my fuse was blown. i put a new fuse in and dissconnected the battery for a min and the code went away that was my prob maybe it will help u.

Boy is the internet great or what, you guys directed me straight to my problem, being the blown fuse.Thanks

eric Ram · 03-19-2007, 08:59 AM

Can anyone tell me where this fuse is? Which one?

Thanks.

1thunder · 03-21-2007, 06:52 PM

it's in the pdc {fuse box} under the hood it's a 25 amp fuse at the centre row at the very end towards the engine

eric Ram · 03-28-2007, 07:40 AM

OK, I replaced the fuse and disconnected the battery but I still have the check engine light on and the P1491 code, any suggestions. THe truck has almost 90K on it. If there is a tSB on this, wouldn't this be covered since it is a design flaw, and probably should have been a recall.

POST REPLY TO THIS THREAD