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Yes, the maf sensor can cause 0171 code, (lean condition). I had that code and my 2000 echo acted like not getting enough fuel. I already replaced an oxygen sensor which was no help. In response to a tip on this site that echo is prone to show this code due to dirty maf,, I cleaned the maf with electronics cleaner spray and dried it with compressed air. I erased the code, trouble light stays off and performance improved dramatically. The maf did not look very dirty but apparently a little dirt is a lot on an maf. It is expensive and fragile so only use electronics spray and compressed air. Don't directly touch the sensor wires.
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∙ 17y ago
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