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Obd Ii Code P0401


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1999 camry V6. I had to repair a wire to one of the injectors under the intake manifold. I doing so I removed the intake. In order to do that I had to take off the Hot Air intake (exhaust recirculation?). To remove that I removed a thingy that looked like a oxygen sensor from the re-circ pipe. It was carboned up so I cleaned it before reinstalling it. Should I have?

If this is not the right direction to figure out the 401 code I would appreciate any advise you guys might have. Thanks.

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