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1998 Toyota Camry 2.2L with engine code P0171, MAF Sensor, what is the meaning of the code?

Vehicle: 1998 Toyota Camry 2.2L

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HI there,

There can be several reasons for this code to appear. The maf sensor is one, you could also have a bad front O2 sensor, intake manifold leak, I have even see plugged converters cause the issue. If there is exhaust blowing back it will cause it. Also, low fuel pressure will cause this code.
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P0171 Toyota Code - Fuel Trim System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_toyota.html

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