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P0505 Toyota

P0505 Toyota - Idle Air Control System

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P0505 Toyota Comments |  Add Comment
Possible causes
- Electronic Throttle Control System (ETCS).
- Air induction system
- PCV hose connection
Help with Possible causes What does this mean?
Tech notes
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
Help with Tech Notes What does this mean?
When is the code detected?
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.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hard to start
- Rough or erratic idle speed
P0505 Toyota Description

The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is composed of the throttle motor, which operates the throttle valve, and the throttle position sensor, which detects the opening angle of the throttle valve. The Engine Control Module (ECM) controls the throttle motor to provide the proper throttle valve opening angle to obtain the target idle speed.

P0505 Toyota Information for specific Toyota models
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TOYOTA Technical Service Bulletins for P0505 code
2005 TOYOTA AVALON Engine And Engine Cooling:engine Details
2005 TOYOTA AVALON Power Train:automatic Transmission:control Module (tcm, Pcm) Details
2006 TOYOTA AVALON Engine And Engine Cooling:engine Details
2006 TOYOTA AVALON Power Train:automatic Transmission:control Module (tcm, Pcm) Details
2006 TOYOTA RAV4 Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
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