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Code P 133

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Old 10-30-2004, 07:37 PM
johnappleseed johnappleseed is offline
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Code P 133

Does anyone have any suggestions for this code? I am guessing it has something to do with my fuel system since i am getting very low mileage. any help would be appreciated. thanks

btw - '98 4.0L

Last edited by johnappleseed; 10-30-2004 at 07:41 PM.
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Old 10-30-2004, 10:38 PM
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P0133 is "O2 sensor circuit slow response; bank 1 sensor 1". Slow response usually indicates the O2 sensor is going bad. Bank 1 sensor 1 is the first sensor after the manifold on the passenger side.
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Old 10-31-2004, 04:43 AM
johnappleseed johnappleseed is offline
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thank you

i will check that out immediately. thanks for the information loneranger.
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Old 10-31-2004, 12:25 PM
johnappleseed johnappleseed is offline
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well, i went around town pricing o2 sensors today. by the time i had made to the 3rd auto parts store, the cel disappeared. is this normal? i assume that the sensor is still going bad. should i wait for the light to come on one more time before i replace? thanks for your help
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Old 10-31-2004, 05:52 PM
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John, I've had that happen before. The MIL would come on and then go off again, usually when driving on the interstate, and then changing to in-town driving. It means the O2 sensor is going bad (or getting covered with carbon), and will fail eventually.

You can change it at your leisure. I'd pick a nice sunny fall day, rather than wait until it gets cold. It'll probably run a lot better and get better mpg with a new one.....
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Old 10-31-2004, 05:58 PM
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sorry, double post

Last edited by thelonerangerxlt; 10-31-2004 at 06:00 PM. Reason: double post, sorry
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Old 10-31-2004, 11:22 PM
johnappleseed johnappleseed is offline
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thanks for the advice...i will replace it soon. it's starting to get cold up here in the northwest - need good mpg to get to the ski hills!!! thanks loneranger
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