Question about 2000 Jeep Grand Cherokee

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What can happen to my 2000 jeep cherokee ,with that code p1491?

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P1491 code, You have a problem with the cooling fan relay. Do not drive this vehicle very far. If it has a Temp Guage keep an eye on it and don't overheat it. Possible engine damage could result. The relay is the most common cause for that code with a no fan operation condition.
The location of this relay. It's in the right front of the engine compartment. Kind of behind and below the RF headlamp and in front of and below the fuse box.
Easy to replace, just unplug it and plug the new one in.
.

Posted on May 04, 2010

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P1491


Google the code

Type: OBD P1491 2002 Jeep

Mar 19, 2014 | 2002 Jeep Liberty

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My 2002 jeep grand cherokee laredo wull not start shutdown 2 days ago checked all fuses but the ecu fuses don't know how to find them


According with your other quesions, the DTC P1491 code is actually radiator fan control relay circuit.
Soft reset if the battery disconnect would have erased the code; the first thing I would replace for that code (fan relay).
Additionally, its possible thta your THEFT system is activated, check owners manual to disarm. Check details here:
- Grand Cherokee fuses

- Diagnostic Trouble Codes

Hope this helps.

Mar 07, 2012 | 2002 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

1 Answer

Transmission code P1491


Please check the code or you may have it re-scanned. Some shops would let you borrow their scanner. The problem is with the cooling fan. It may be a bad relay or the circuit itself or the wiring may be bad.

Sep 26, 2011 | 1999 Jeep Cherokee

1 Answer

P1491 1999 jeep cherokee wont shift after 60


this is an obd2 trouble code table, it can help you understand the meaning of code,
your dtc 1491 is to do with the rad fan relay, very common failure! As for the rear wiper button flashing it means theres a problem with your A/C
or heater controls.

Sep 14, 2011 | Jeep Cherokee Cars & Trucks

1 Answer

Whats causes P1491 code on my 2001 jeep grand cherokee laredo v6?


This may sound strange, but I have seen this code many times. Check all fusesin the power distribution center under the hood. I bet you find a blown fuse...ALSO check your relay. It is probably bad too."Radiator Fan Ctrl Relay Circ" Maybe the computer thinks the fan's misbehaving, so it backs off the power? Hope this helps, James Booth

May 17, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Getting code P1491 can't find the switch. Have looked everywhere. The fender is off and still can't find. 1999 Jeep cherokee classic 4.0 with mfg date of 10/1998. I know this is close to when they...


P1491 Radiator fan relay control circuit
i remember someone else asking this question and another expert said it was behind the bumper ?? ,right looking in the dreaded haynes book and its right side ,no thats a 98 model a 99 model is left side next to vacumn tank ,earlier model its under behind the battery

Nov 02, 2010 | 1999 Jeep Cherokee

1 Answer

Would not shift in to drive or reverse then lights interior flash


According to the fault code, there is no signal from the vehicle speed sensor to the OBD computer. A P1491 code is the radiator fan control circuit. I sounds like you may have an electrical problem that is causing a bunch of false readings. Have the computer reset and try again. You can get all of the fault codes at http://www.wjjeeps.com/faultcodes.htm#0500 Don't forget top rate this solution!!!

Mar 13, 2009 | 2000 Jeep Cherokee

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