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CEL code for no cat

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Old Dec 10, 2003 | 12:30 PM
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JeffWels
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From: Pittsburgh PA
CEL code for no cat
Whoever got a CEL code for no cat was it P0138?
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Old Dec 10, 2003 | 12:44 PM
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clappton
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no it should be p0420-catlyst system efficiency below threshold. If you go to http://www.obdii.com/codes.html it lists most of them.
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Old Dec 10, 2003 | 12:49 PM
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JeffWels
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I know its an overvoltage code in the o2 sensor, I just thought that some people with no cat were getting the same signal?
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Old Dec 10, 2003 | 05:35 PM
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I got a 0420 and then when I tried to fix it a 0139 which is a "Sensor Slow to Respond" code.
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