1999 Jeep Grand Cherokee "o2 sensors 99" Questions

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...99 jeep Cherokee 4.0 2wd and it's running rich, missing, and popping. The SUV runs fine then I loose power get a pop then I get power again check engine light is on and the code says a rear o2 sensor ...

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99 jgc v8 used to get 18 mpg now gets 4-10mpg has codes has 6 codes PO202,P0203,P0206,P0208,P0133,P0171 RUNS A LITTLE RUFF AT IDLE BUT FIN OFF IDLE. P0202,203,206,208 are injector control circuit ...

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Question about Jeep Grand Cherokee

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...99 jeep GC Laredo 4wd suddenly consumes more fuel than it did a day ago. Filled up this morning, said 277 miles until empty. By afternoon it is at 158 and I only drove a total of 40 miles today. And ...

Question about Jeep Grand Cherokee

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...sensors, spark plugs and battery. Could it be the PCM is going out or needs to be re-calibrated. It sounds to me like your upper o2 sensor may need to be replaced go under the truck on the drivers ...

Question about Jeep Grand Cherokee

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...99.Took it to Auto Zone the codes came back faulty gas cap, O2 sensor and another thing.Replaced all that stuff kept doing it,finally had to take it to a shop were they read a code.Was the crankshaft ...

O2 sensors, fuel pump, fuel filter, vacum leak (wich i think i hear it) , perhaps a hose not conected right, anyways i noticed that it starts ok but once i run for a couple of miles the problem starts

Question about Jeep Grand Cherokee

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...o2 sensor back on, the computer said it was bad & it ran rough but at least it ran! That change did nothing, it stills dies immediately after starting. I am in the process of cleaning the high ...

Question about Jeep Grand Cherokee

1 Answer

...99 Ram I'm getting code P0138 "O2 Sensor circuit high voltage" on my 99 Ram 1500. Does this just mean I need to replace the O2 sensor or could it be something else? Would it be the pre or post ...

O2 heater circuit fuse location 99 Mercedes Benz s420 If the circuit is bad for a heated o2 sensor its not tbe fuse its a bad o2 sensor. Replace the sensor and you shoukd be fine

Question about Jeep Grand Cherokee

2 Answers

...if im replacing the rite one? codes p0420 and p0430 are both post o2 sensors, the ones after the convertor, both sides if replacing I replace all three o2 sensor and still get p0420 Help ...

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