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P0133 Replace or check wiring harness

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Old 03-31-2012, 08:15 PM
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P0133 Replace or check wiring harness
So i've been getting an intermittent P0133 on my 2000 GLE with 150k on the clock that lately seems to be staying on all the time now, not to mention my gas mileage has tanked. My question is, should i just go ahead and replace the front right oxygen sensor or are there any other common issues such as a faulty wiring harness that i should look for? Thanks
Last edited by kdarcangelis870; 03-31-2012 at 08:19 PM.
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Old 04-01-2012, 10:47 AM
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99 times out of a hundred it is the sensor, but you always check the wires before replacing a part.
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