Throttle Position Sensor Fault (P0505) Troubleshooting Guide for Mechanics

The P0505 code is set when the IACV-AAC valve does not operate properly. What are Code Possible Symptoms? Engine Light ... His suggestion was to take off the Throttle body assy, remove the IAC Valve, take it apart, clean it thoroughly, and lube with WD-40. It worked. This code happens when the actual idle speed varies from the target idling speed by more than 200 rpm, for five times or more during a drive cycle. This code which states IAC fault, there is no idle air control valve, no idle speed controller, or EGR system. P0505 code definition Idle Control System Malfunction What the P0505 code means P0505 is an OBD-II generic code that the engine control module (ECM) ... A P0505 is an Idle Air Control issue, it has nothing to do with the PCM. The IAC is what provides and controls all of the engine's air when the ... This code comes on for two conditions. When the idle speed isn't the specified amount or a learned value of the idle speed control remains the maximum or ... Problem solved! It seems the "Wise One" here installed the EGR valve with no gasket. This allowed the hold down nuts to loosen (or they were ... The check engine light is getting triggered when the PCM is in a closed loop operation. It also means that it is starting to monitor the OS2 sensor input. P0505. IDLE CONTROL SYSTEM MALFUNCTION. CIRCUIT DESCRIPTION. The rotary solenoid type ISC valve is located under the throttle body and intake air bypassing the ...