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Please Help: How To Explain This Screen Shot From

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Dear friends, my 2002 RX300 got error code P0171 and P0136 last week. I changed MAF sensor from Autozone. No improvement. Yesterday, P0174 also showed up. I bought a cheap OBDII adapter from Ebay and then installed free software scantool_netwin113 in my laptop. Today, I got sensor data from scantool. The screen shot is attached here.

Anyone can help me interpret it?


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