PO172 2000 INSIGHT


Asked by Nov 23, 2015 at 02:06 PM about the 2000 Honda Insight 2 Dr STD Hatchback

Question type: General

3 Answers


Several things causing a rich running condition. Too much fuel not enough air - http://www.engine-codes.com/p0172_honda.html

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Best Answer

Bank 1 System Too Rich your upstream oxygen sensor is bad

2 out of 2 people think this is helpful.

Not necessarily. No. Everybody jumps to 02 sensors when that is there are many other possibilities. This reputable site does not even mention 02 sensors, they measure the amount of oxygen in exhaust, not air /fuel ratio, there is one of those in the exhaust stream also. -- http://www.obd-codes.com/p0172

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