Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
There is a factory service bulletin for the following Toyota vehicles:
2005-2009 Toyota Avalon
2007-2010 Toyota Camry
2008-2009 Toyota Highlander
2006-2009 Toyota RAV4
2007-2010 Toyota Sienna
2009 Toyota Venza
Toyota Factory Service Bulletin OBDII Code P0505
To diagnose the P0505 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of 1) the one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; and 5) the Engine Control Module (ECM), which controls the ETCS. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
The ECM monitors the idle speed and idling airflow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if the Idle speed continues to vary greatly from the target idle speed.
Need more information on how to fix the P0505 Toyota code? Get Access to Factory Service Manuals
Get the P0505 Toyota code diagnosed by a professional: Find a repair shop in your area
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