Discover everything you need to know about the P0172 Honda code. Learn its meaning, symptoms, causes, and how you can fix it yourself. Useful for Honda Accord drivers or anyone dealing with the Honda P0172 code. Gain an understanding of this common automotive issue.. Honda Civic P0172 Causes. Here are the most common causes of P0172 in the Honda Civic: Vacuum Leaks- With the Honda Civic, a vacuum leak is one of the most common causes of the P0172 code. Take a look around and see if you can find a vacuum leak.
Top Honda Civic P0172 Causes Vacuum Leaks- With the Honda Civic, one of the most common causes for the P0172 code to show is a vacuum leak. Take a look around and see if you can find the vacuum leak, Oxygen Sensor- The P0172 codes is thrown when the oxygen sensor(s) do not register the right amount of oxygen in the exhaust. When the oxygen.. 2017 Honda Civic EX Hatch. Getting P0172 along with P219C (no. 1 cylinder air-fuel ratio variation) and P0303 and P0304 (misfires on no. 3 and 4 cylinders).. I have a honda pilot 2003 po172 code for rich fuel trim keeps coming on. Spark plugs, coils, And valves are good. Replaced air filter, egr valve, both 02 sensors, map sensor, throttle.