Honda Odyssey 2001 P0505 Idle Air Control

. 280 AnswersSOURCE:RamonP0420 relates to the catalytic converter. The computer sees little or no improvement in the exhaust before and after going through the converter. Either your oxygen sensors need replacement (3 total) or you need a new catalytic converter.What is the mileage on the vehicle? Does it run well?

Oxygen sensors generally start to fail after 70,000 miles. Catalytic converters usually fail because the engine is runnig rich and the owner ignores that fault for months. This causes the catalytic converter to overheat and fail.P1456 relates to the evaporative emission system. This system holds the gas fumes in the system so they are not vented to the atmosphere. The most common cause of this code being set is failing to properly tighten the gas cap after refueling.

Take the cap off and clean the sealing O-ring. Put it back on and tighten till it clicks 3 times.

Make sure you have the correct gray colored gas cap. Clear the code and see if it resets within a few days.

I have a 2001 honda it has code p0505 in it after i cleened the egr port - Answered by a verified Mechanic for Honda. Code p0505 is for an issue with the idle air control valve. If you erase the code does the check engine light come back on immediatlely? My 2001 Honda Odyssey EX has developed an erratic miss problem at startup.