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Old 04-14-2011, 12:35 AM
Apbrown
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Default Codes: p0031, p0328, p0420

My SES light came on so I took it to a shop for it to be read and I found out I had 3 codes show: p0031-HO2S heater control circuit low(b1,s1), p0328-knock sensor 1 circuit high output, and p0420- catalyst effic below threshold b1. I have taken it to different shops to get ideas on what to do to fix it and I have received may different answers from just replace the knock sensor (which I found out to be fairly expensive to replace because of where it is located). To replace the catalytic converter to replace all o2 sensors. I am confused on what my plan of action to be any help would be greatly appreciated. I am beginning to hate having that SES light on and my loss of power and low mpg.
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