Question about 1998 Dodge Grand Caravan

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Replaced a radiator fan relay switch p1491

Replaced radiator fan relay switch they said it take like a week to make the check engine light go out. the day i change relay was the third of July and today its still on went back to advance and had them put it back on the scanner nothing else comes up but p1491 doesn't over heat anymore but could it be one of the fans burnt out keeping the light on don't know and need help.

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  • bharris727 Jul 19, 2010

    http://www.ptcruizer.com/computer-codes....

  • pauldogs Jul 19, 2010

    replaced radiator fan relay switch they said it takes like a week to go out.the day i change the relay was the third of July and today it is still onwent back to advanceand had them put it back on the sanner nothing else comes up but p1491 but doesn't over heat anymore

  • pauldogs Jul 19, 2010

    peplaced fan relay now check engine light won't go out and air condition lights are flashing

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  • Master
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There should have been an erase button on the scanner they used at advance, this should erase the memory

Posted on Jul 19, 2010

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P0300, P0305, P0306, P0320, P1491


Yes, most probably a new crank position sensor will solve your stalling problem. I would change that sensor first and then see if you still get other fault codes. The fan continuously running will reduce the lifetime of the fan and will lower the mpg. I would change the relay.

Aug 19, 2013 | 2004 Jeep Grand Cherokee

1 Answer

P0300, P0305, P0306, P0320, P1491


Not necessarily, you will just have to unplug it. The fan relay switch isn't that expensive so you should if you can. The multiple misfires usually means that you need a tune-up with plugs,coils and some sensors when required.

Aug 19, 2013 | 2004 Jeep Grand Cherokee

1 Answer

1999 Jeep Cherokee Sport wont shift into overdrive P1491


P1491 - Radiator Fan Control Relay Circuit Open Or Shorted

When monitored: with the ignition key on, battery voltage greater than 10.0 volts and
the pcm requests the radiator fan to be turned on.
Set condition: an open or shorted circuit is detected in the radiator fan relay control
circuit.

Possible causes
radiator fan ctrl rly circuit wire harn intermittent defect
radiator fan ctrl rly circuit wire harn observable defect
radiator fan relay ground circuit open
rad fan relay control circuit open
radiator fan relay control circuit short to ground
rad fan control relay defective
pcm defective

Check ot and keep us updared.

Oct 15, 2011 | 1999 Jeep Cherokee

3 Answers

Code p1491 on a dodge caravan


Trouble code P1491 means: Radiator fan relay control circuit

Feb 28, 2011 | Dodge Caravan Cars & Trucks

1 Answer

I have a chrysler 2003 town & country - the check engine light came on and it has 2 codes - P1684 & P1491. Can you tell me what the problem might be?


P1491 Radiator fan relay control circuit, Most likely you need a fan relay or fan module.
P1684 Battery was disconnected, this code will not turn on CEL

Feb 18, 2011 | Chrysler Town & Country Cars & Trucks

2 Answers

I was in a minor fender bender ( bumped the car in front of me and did little cosmotic damage.) After that my check engine light came on. The code is P1491 Manufacturer Control Axillary Emissions...


The DTC (Data Trouble Code) P1491 for Chrysler-Jeep is for the Radiator Fan Control Relay Circuit, and the radiator fan control relay is located between the radiator and the AC condenser, and there is the possibility that a collision could have damaged the radiator control relay or the wiring. Here is an image of a chrysler radiator control relay to help assist you.




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Nov 28, 2010 | 2003 Chrysler Town & Country

2 Answers

P1491 diagnostics code for 2003 Jeep Grand Cherokee



Trouble Code: P1491 You PCM does not sense current to radiator fan when it turns it on. Is the fan coming on or not? Usually not when you have this code. Problem can be with the fuse, relay, wiring or fan itself. First check the fuse. If good, next try swapping the relay with another one in the engine compartment relay box, such as the horn relay.
Let the car warm up and see if the fan will come on. If yes, get a new relay. If not, either use a test light to see if there is voltage at the fan connector when the engine is on and hot, or else test the fan motor by hotwiring it to the battery. If none of this works, please get back to me for how to troubleshoot the wiring.


Radiator Fan Control Relay Circuit Malfunction
Possible Causes:


Radiator fan control relay circuit is open or shorted to ground Radiator fan control relay circuit is open (test power to IGN) Radiator fan control relay is damaged or has failed PCM has failed

Nov 10, 2010 | 2003 Jeep Grand Cherokee

2 Answers

Check Engine Light


It is for the radiator fan relay control circuit.It means there is a problem in the cooling fan relay circuit.Could be the relay,wiring,or the fans.Check the fuses and relay over if it looks good then you have to take it in to get it diagnosed.You need a scan tool and you also need to know how to use a multimeter.Hope this helps.Good luck.

Feb 24, 2010 | 2000 Dodge Caravan

1 Answer

My 1997 dodge neon sohc auto check engine light is on with engine code p1491(open or shorted condition dectected in the radiator fan relay circuit) fan runs all the time with key on or off. replaced fan...


First, the easy way is to just bypass the relays all together. Install a switch on the inside of the car like you would fog lights. This will solve the problem of replacing thing after thing and wasting money. Just a $7.00 fix. After doing that unplug all the sensors and then the battery for at least 60 second to reset the computer. Than restart the car and the check engine light should go out, may take a day or so. Same thing with your gas cap, re-securing it will take a day or so for the light to go out. Good luck. I love my '97 neon.

Apr 25, 2009 | 1998 Dodge Neon

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