Possible causes
– Electronic Throttle Control System (ETCS).
– Air induction system
– PCV hose connection
– Air induction system
– PCV hose connection
Tech description
The is a factory service bulletin for the following Toyota vehicles:
2005 and 2009 Toyota Avalon
2007 and 2010 Toyota Camry
2008 and 2009 Toyota Highlander
2006 and 2009 Toyota RAV4
2007 and 2010 Toyota Sienna
2009 Toyota Venza
Toyota Factory Service Bulletin OBDII Code P0505
When is the obd code mean?
The ECM regulates the idle speed by opening and closing the throttle valve using the ETCS. The ECM concludes that the idle speed control ECM function is malfunctioning if: 1) the actual idle RPM varies more than the specified amount five times or more during a drive cycle, or 2) a learning value of the idle speed control remains at the maximum or minimum five times or more during a drive cycle. The ECM will turn on the MIL and set a DTC.
Example: If the actual idle RPM varies from the target idle RPM by more than 200* rpm five times during a drive cycle, the ECM will turn on the MIL and will set a DTC.
Example: If the actual idle RPM varies from the target idle RPM by more than 200* rpm five times during a drive cycle, the ECM will turn on the MIL and will set a DTC.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine hard to start
– Rough or erratic idle speed
– Engine hard to start
– Rough or erratic idle speed
P0505 TOYOTA OBD Code Description