Throttle Position Sensor Troubleshooting Simplified (P0505) A Guide for Beginners

The P0505 code is set when the IACV-AAC valve does not operate properly. What are Code Possible Symptoms? Engine Light ... The code P0505 - Idle Control System Malfunction means that the engine computer cannot regulate the idle speed. In other words, the actual idle speed varies ... 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 ... Detailed information on troubleshooting and repairing a P0505 DTC code which refers to a malfunction of the IAC (Idle Air Control) system. Also ... My erratic idle is still just that - erratic. Sometimes the engine speed drops out and dies coming up to a stoplight, and sometimes it doesn't. Code P0505 points to a straightforward issue – an idle control system malfunction. This impacts engine RPMs at idle, causing a rough run. 1st- I believe the IACV is shorting due to it overheating. Both bad IACV's showed no signs of deterioration in the coolant channels, just bad impedance ... OBD-II fault code P0505 means that the Idle Control System is not managing the engine idle speed properly, which can lead to low, rough, ... A P0505 trouble code will generally trigger the check engine light on. Depending on your vehicle's make, the check engine light may be referred to as the CEL. That doesn't mean that the P0505 error code is caused only by the failure of the idle air controller. Want to erase your check engine light and fix your P0505 ...