P0505 is an OBD-II generic code that the engine control module (ECM) determined the engine idle control system is not managing the idle to stay in specification. The idle is too high or goes too low.

Can I drive with a P0505 code?

Trouble code P0505 should be diagnosed and repaired as soon as possible. Not recommended, however, you may drive your vehicle while trouble code P0505 is present unless the engine stall or stumbling is is severe enough to hinder proper vehicle operation. Erratic or lack of idle control may be noticed.

What is P0505 code?

What Does the P0505 Code Mean? Diagnostic trouble code (DTC) P0505 stands for “Idle Control System.” The code may be accompanied by erratic idle speeds that can lead to stalling and other issues. On most older vehicles, the idle control system relies on an idle air control valve (IAC) on or near the throttle body.