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This code keeps coming up we changed the o2 sensor and put new plugs and wires on. The truck is hesitating and seems to lose power going up hills and is now smoking. It is a 2004 chevy avalanche.

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This could be due to the wrong O2 sensor, Bad Catalytic Convertor, EGR valve or something along those lines. Did you replace this with an OEM part and not have to change the wiring harness or did you have to change the wirings? The other most common issue is you changed it with a non-OEM product and the O2 sensor is not reading correctly. Check to make sure wires are hooked up correctly. Also not know the details of this vehicle it can be that you changed the wrong O2 sensor also, most vehicles have an O2 sensor before and after the Catalytic Convertor

Posted on May 19, 2011

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1 Answer

No power when climbing a hill


It seems I have more questions that need to be answered. Have you got any on board diagnostic codes. If not you need to hook up a code reader to see if it is storing any codes that will let you to the problem. Most generally the lose of power is related to the timing and is controlled by the O2 sensors. another this is the mass air flow sensor located on the air intake tube next to the air filter. I hope this has been of some help. Good Luck

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