P0505 Unraveling the Secrets of the Throttle Position Sensor Malfunction

Celica Forums General Discussion General Code: P0505 ; IDLE AIR CONTROL SYSTEM FAULT. The PCM monitors the voltages of the IAC circuits. If it detects an incorrect voltage on one or more of the IAC motor circuits, it will set the P0505 code. It ... Customer: I have a code p0505 and I changed the idle control valve twice. Mechanic's Assistant: Have you seen this error before with the same vehicle? P0505 = Adaptive Air Idle Trim (Upper/Lower) Volvo DTC Code EFI-233 Possible source(s) Upper limit:[*]Clogged air cleaner or air intake.[*]Contact resistance ... P0505. Idle Control System Malfunction. CIRCUIT DESCRIPTION. The rotary solenoid type IAC valve is located on the throttle body and intake air bypassing the ... Follow this step by step how to DIY video guide from IZZY's GARAGE on how to remove and change your old, malfunctioning IDLE AIR CONTROL ... Hey, Guys I need help with this. I've already tried cleaning the idle air control valve and the throttle body I cant get this to go away. Anyone have. P0505 can be caused by not only a bad IACV but also a vacuum leak, misadjusted idle speed, bad ECT sensor/circuit, or bad TPS sensor/circuit. LS - 1st and 2nd Gen (1990-2000) - P0505 Idle control malfunction - Got a CEL this weekend on my '98 LS. I pulled a P0505 code out of it ... Depress the accelerator pedal slightly. Start the engine and run for 5 seconds. Turn the ignition switch to the OFF position for 10 seconds.