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All Tags » air intake sensor (RSS)
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My 5.3L check engine light is on. My diagnostic trouble code tester reads (2) error codes----- PO171 and PO174. My chilton manual says "Fuel system lean at upstream oxygen sensor" for left and right cylinder banks as an explanation of the code. But, what now? Anyone know what I should be looking at--- replacement of O2 sensor or ...
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2 wire Air Intake Sensor location? Or Engine Coolant Temperature sensor location.
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