Question about 2004 Jeep Grand Cherokee

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My 04 Grand Cherokee 4.0 keeps blowing the o2 sensor fuse. Just replace all 4 sensors. Ran fine for about 500 miles, then boom.Help

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Posted on Jan 02, 2017

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SOURCE: P0155 & P0135

O2 sensors are tricky. sometimes like anything else they fail. many times though the exhaust mixture they encounter is out of their range and that shows up as a failure.since you seem to have no other problems , I would go ahead and change them, but don't be disappointed if the code shows up again (at least you know it's not the sensors.) I don't like using the process of elimination when doing repairs but sometimes you must.

Posted on Mar 16, 2009

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SOURCE: 2004 Grand Cherokee: oil pressure fluctuates

if you know for certain that the sending unit is correct and the guage is accurate, then yiu may have big problems.....while the engine is running open the oil filler hole.. is everything wet with oil? or does it look dry or just a little lubed? you can allways install an aftermarket oil pressure guage(crappy tire) if you get the same results with that then you may have a week oil pump....worst case scenerio... need an engine rebuild as the moter may have wear issues.does the pressure slowly drop as the motor warms up? at idle ? does it jump up when you step on the gas?

Posted on Mar 30, 2009

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SOURCE: Engine light comes on 2003 Jeep grand cherokee laredo

Check the Fuel Pump Relay, it may be malfunctioning and need replaced. Also, in some vechicles, if the batter is disconnected and reconnected, the service engine light will come on from time to time, going off and on simultaneously. Have a diagnostics done to see if any codes show up. If no codes appear, then have them all cleared and drive for another 200 miles. Sometimes the computer will need to be cleared a couple times before the light will stay off. Make sure that all fuses and relays are good, and securey in place. Check all factory installed lights to make sure they are good, and securly in place as well.

Posted on Mar 31, 2009

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SOURCE: need to replace knock sensor/ O2 sensor 04 kia rio


Posted on Sep 18, 2009

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SOURCE: 98 grand cherokee asd relay blowing fuse

The fuse it doing it's job, you have a short ( Wire that is connected to a ground, that draws too much power )

If you have an electrical schematic ( Repair manual ) find out which wires are connected to that fuse and check them for any chaffing, cuts, unnesassary twists, or corrosion.

If you have a ohm-meter, isolate the system ( by disconnecting the fuse, and other connections. Then check for any resistance on wires that should not be connected ( because you disconnected them ) by having one Lead on the wire's connector and the other meter-lead on your car's frame. A good wire will not have continuity if it is isolated.

Posted on Apr 10, 2010

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1 Answer

I have a 2000 intrepid and it blows the 02 ssr sensor everyday i put a 30 amp in it ran great for aweek then those started blowing what can i do to fix this?

Fuse for an Oxygen Sensor?
You don't use the car,you component
test the sensor or it's circuit & resolve the issue
For a fuse to blow you would need a failed heater circuit
in the sensor,so it basically faied
O2 Sensors get replaced every 100,000 miles or sooner if they fail
You should have a MIL lamp on your dash & codes to be

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Look for a power relay in the fuse box under the hood.When you find it change it with another one in the fuse box that has the same part number on it.Make sure not to use the fuel pump relay.

Jan 20, 2012 | 1996 Jeep Grand Cherokee

1 Answer

Grand cherokee o2 sensor straight 6

Sounds like an aftermarket O2 sensor was replaced. Should not be the problem unless your check engine light is on and giving that code. Also have you looked into your erg valve?

Dec 24, 2011 | 1998 Jeep Grand Cherokee

1 Answer

Hi, I own a 96' 4x4 3.4L Ext. Cab T-100 and it WILL NOT STOP BLOWING THE EFI FUSE! Before, it seemed as though the fuse blow time to drive ratio got smaller as the engine got hotter. In otherwords it...

possibly you have a schafted wire in the wiring loom at the fuel injectors, or at the fuse junction box. (short) hit a bump just right and it shorts out blowing the fuse.

Feb 12, 2011 | 1996 Toyota T100

1 Answer

I have a 97 grand cherokee it keeps blowing the asd fuse i changed the pcm,the cam and crank sensors it started and i drove about a block and it blew the fuse again i changed the fuse and turned it over...

Hi, the asd relay powers a lot of things. You may have to unhook some stuff to figure out what is causing the problem. Is your engine light on? I think the O2 sensor heaters are on that fuse but they should throw a trouble code, as the PCM monitors that current. You could unhook the EVAP leak detection pump--I think it's in the rear bumper on driver's side. The injectors are on the fuse as well as the alternator stator current. Perhaps you could disconnect the pump, O2 sensors, and the alternator (just the connector--not the charge wire). Then start the car and hook stuff back one at a time until the fuse blows. Make sense? Let me know if you have questions and thanks for using FixYa.


Jan 08, 2011 | 1996 Jeep Grand Cherokee

1 Answer

Gages dont work, 20 amp fuse under hood keeps blowing. turn key motor turns but dont start

Is it the ecm fuse. Check the o2 sensor wires. On this model sometimes they rub on the rear driveshaft and blow fuses.

Jul 25, 2010 | 1996 Jeep Grand Cherokee

2 Answers

I've had my Jeep in the shop 3 times over the past

an o2 sensor would not make your vehicle do this the o2 sensor may sending an error code do to the fuel being to rich or to lean while it's passing by.this sounds more like a bad map sensor ot mass air flow sensor try pulling them out and cleaning them

Jan 12, 2010 | 2004 Jeep Grand Cherokee

1 Answer

97 jeep cherokee blows fuse #11

I think fuse 11 is transmission control module, powertrain control module, automatic shutdown relay, fuel pump relay.. most likely it could be an issue with the wirings from the tranny. Check this one out before opening the conduit

Jun 03, 2009 | 1996 Jeep Grand Cherokee

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