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I want to know what are the reasons for malfunction of o2 sensor of chevy aveo 2008

Vehicle: 2007, Chevrolet aveo a.4l

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P0131 -02 sensor low voltage (bank 1 Sensor 1 )

What can cause this is the 02 sensor itself , due to degrade , mileage, What you also need to look for is a lean condition which is caused by the fuel injector, if you are coming up with P0420 and P0133, the fuel injector are required to be replaced. TSB 08-06-04-027B.

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