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P1491. 2000 cherokee limited 4.0 4x4. Started with other
Yes started with other codes and replaced the 02 sensor front … read more
Ron
Ron
Automotive Tech
Vocational, Technical or Trade Scho
39,396 satisfied customers
P1491 Code, Radiator fan relay circuit. and yes multiple
Radiator fan relay circuit. and yes multiple times. I have replaced the relay, Thermostat sensor, and Fan clutch. It was over heating as well but not now … read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
1,094 satisfied customers
Well my 2001 Cherokee Sport has a Fan Clutch Relay and Purge
Well my 2001 Cherokee Sport has a Fan Clutch Relay and Purge Solenoid Failure engine codes but I cant get them to go away replacing the relay multiple times. Also replacing the surge solenoid and fan … read more
Juan Crespo
Juan Crespo
Sr. Technician
Bachelor's Degree
1,262 satisfied customers
2001 jeep cherokee sport p1491 radiator fan relay. Fan works,
2001 jeep cherokee sport p1491 radiator fan relay. Fan works, relay works, I don't have a test computer. Do I just replace the fan?… read more
sprinkles08
sprinkles08
Technician
High School or GED
18,866 satisfied customers
Grand Cherokee: My jeep grand Cherokee is quitting and it
My jeep grand Cherokee is quitting and it seems it is not getting fuel. When put on a computer it gives a code of P1491 Man code. Auxillary emission controls. What is this and what part do I need.… read more
ND-TECH
ND-TECH
Chrysler/Jeep/Dodge specialist tech
Vocational, Technical or Trade Scho
1,410 satisfied customers
1999 Jeep Cherokee Sport: turn signals stopped working..Hazards..bulbs
I have a 1999 Jeep Cherokee Sport. The turn signals stopped working. Hazards still work and bulbs are are good. Tried to replace the turn signal relay but that did not fix it. what else should I check… read more
-Brad-
-Brad-
Foreman Dodge Dealership
Vocational, Technical or Trade Scho
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Jeep cherokee 2001 jeep cherokee; engine light came on and
2001 jeep cherokee; engine light came on and got codes P0443 and P1491.Can you tell me what these mean?… read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
1,094 satisfied customers
2003 Jeep Grand cherokee se: my asd relay and fuse blew
My ASD relay and fuse blew so I changed them out but the 2003 Jeep Grand Cherokee won't start.… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
2002 Jeep Grand cherokee laredo: was overheating..thermostat
I have a 2002 Jeep Grand Cherokee Lerado that was overheating. I replaced w/new temp. sensor,thermostat 190*,fan relay.This got the fan to work for aprox. 1,000 mi. . It stated again.This time the eng… read more
Matt Hardy
Matt Hardy
Master Auto Repair Technician
Associate Degree
919 satisfied customers
Jeep Grand Cherokee 4x4 recently i swaped pcm on my 99 jeep
recently i swaped pcm on my 99 jeep grand cherokee had a p1491 code (rad fan control), but now my jeep has codes 0130,1036,0152,1058 and 1495 on after replacing pcm, i also noticed that there's is no … read more
Eric
Eric
Retired
N/A
37,067 satisfied customers
1999 jeep grand cherokee: 4x4...code came..radiator fan..fan relay
HI! I have a 1999 jeep grand cherokee with 4.7 litter engine. 4x4. Diagnostic code came up p1491 radiator fan relay control circuit. How can i fix it? Thanks!… read more
Paul M ASE Master
Paul M ASE Master
Automotive College
4,570 satisfied customers
1999 Jeep Cherokee Classic: radiator..cooling fan..relays and ECM.
My 1999 Jeep Cherokee Classic 4.0 is coding P1491 and P0705. AC compressor and radiator cooling fan are not working. Have replaced relays and ECM. SCodes still will not clear. Keep hearing about anoth… read more
ND-TECH
ND-TECH
Chrysler/Jeep/Dodge specialist tech
Vocational, Technical or Trade Scho
1,410 satisfied customers
2002 jeep liberty: check engine light..engine light and battery light
2002 jeep liberty, code is p1491, auxillary emissions control, check engine light and battery light on… read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
3,735 satisfied customers
I have a 1998 Jeep Cherokee, 4.0, 4wd, auto trans. I just had
I have a 1998 Jeep Cherokee, 4.0, 4wd, auto trans. I just had the following system failures occur all at once: Overhead light cluster, radio, all gauges on the instrument panel, AC blowing hot. These … read more
Sean Medling
Sean Medling
High School or GED
36 satisfied customers
right side brake lights,signal,hazard are out..bulbs..my ac..o2 sensor
the right side brake lights,signal,hazard are out. replace bulbs,still not working. also, i look at my fuse and relay box under my hood and my fuse(or relay)to my ac clutch,fronto2 sensor,and rear o2 … read more
Chris
Chris
Shop Foreman
3,850 satisfied customers
3 jeep liberty: check engine light..code reader..emission..controls
have a thousand 3 jeep liberty check engine light is on have code reader tested come up with code p1491 it says manufacturer control auxiliary emission controls is this something to worry about or nee… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,108 satisfied customers
1999 Jeep Cherokee: heck..changing..Crank sensor, and it started
I just had a heck of a time with my 1999 Jeep Cherokee. It would not start, and after changing a variety of electrical components, I took it to the shop. They changed the Crank sensor, and it started.… read more
Mark
Mark
22 Year Factory trained technician
Vocational, Technical or Trade Scho
2,760 satisfied customers
1998 cherokee sport: engine light on...autozone)..radiator fan..ac
1998 cherokee sport. I have an engine light on. Set Codes PO443 PO700, PO705 and a P1491 (from Autozone) The radiator fan does not work, The AC does not work, back uplights do not work and transmissio… read more
ttiger79
ttiger79
Auto Mechanic
High School or GED
880 satisfied customers
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Meet the Experts:

Chris

Chris

Shop Foreman

3,850 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,760 satisfied customers

Jeep factory training........25 years in the industry.

Dave

Dave

Jeep Master Tech

1,149 satisfied customers

Chrysler Triple Master, ASE master Tech AA degree in Auto.

moparfl

moparfl

ASE Certified Technician

1,130 satisfied customers

ASE Master Tech Chrysler Dodge Jeep Master Tech

Tim Mohr

Tim Mohr

ASE MASTER TECH

1,094 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Chris (aka-Moose)

Chris (aka-Moose)

Technician

699 satisfied customers

16 years of experience

jeepmopar76

jeepmopar76

Jeep/Chrysler Triple Master Tech

581 satisfied customers

32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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