Question about 2004 Jeep Grand Cherokee

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My jeep grand cherokee check engine light is on and I've had the oxygen sensors already replaced

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Posted on Sep 29, 2009

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1 Answer

Engine light keeps coming on and have replaced oxygen sensor twice


Before changing any parts, you need to know the fault codes that are setting the check engine light. This will tell you the area of the problem.

Oct 07, 2011 | 2000 Jeep Grand Cherokee

1 Answer

I have a 2001 jeep grand ckerokee with the small engine light staying on all the time. I have replaced 3 of the 02 sensers, new manifold,new muffler for the 02 reading, replaced the thermostat, and the...


The best advice that I can offer is to have your Engine computer scanned and diagnosed by a qualifed sevice technician and find out why the Engine Computer is turning the light on. If the light is on, it is because the computer has stored one or more fault codes. Fault codes NEVER tell you what parts to replace. They only tell you that one or more of the many systems monitored by the computer is operating outside of its expected "Range" or "Window of Operation". It is up to the person performing diagnosis to test the system that is failing and determine the actual cause of the failure and repair as necessary. You can spend a LOT of money replacing a LOT of parts and NOT fix the problem if proper diagnosis is not performed. Fault codes for the Oxygen sensors are RARELY caused by the Oxygen Sensors themselves. Oxygen Sensors are like informers. When someone within the engine management system is not performing their job, it is the Oxygen Sensor's job to rat them out. Replacing the Oxygen Sensors will only cause the new sensor to tell on the same problem. So, in your case, if you have replaced 3 of the Oxygen Sensors, that means that 6 Oxygen sensor have all been trying to tell you that there is a "Slacker" in the ranks! Stop wasting your money and fire the fool!

Jan 22, 2011 | 2000 Jeep Grand Cherokee

1 Answer

$250 oxygen sensor parts only 2002 Jeep GC too much? needed?


YEP A BAD OXYGEN SENSOR WILL CAUSE ENGINE TO RUN RICH.CAUSING UNBURN FUEL TO GO TO THE CATALYTIC CONVERTER AND BURN IT OUT.

Aug 23, 2009 | 2002 Jeep Grand Cherokee

1 Answer

96 cherokee was missing/cutting out/dying out.would crank after sitting,now it wont start


the crankshaft position sensor controls spark and if faulty would give the symptons you have described you need to get this checked first

May 20, 2009 | 1996 Jeep Grand Cherokee

1 Answer

1997 Grand Cherokee stalls at speed and at stop signs


Mine does the same thing when the oxygen senor goes out... About every 70k miles. doesn't always turn on check engine light

Jan 17, 2009 | 1997 Jeep Grand Cherokee

1 Answer

1996 Jeep Cherokee. O2 sensor problem.


i would check with the dealer who changed the converter to check and see if the sensors were damaged while they replaced the converter or may be they have forgotten to hook it back up check before you throw away your good 02 sensr

Nov 11, 2008 | 1996 Jeep Grand Cherokee

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