DTC P0505: Idle Control System Malfunction: Procedure
WARNING: This page is about a different car, the 2009 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)
- Connect Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the tester on.
- Enter the following the menus: Powertrain / Engine and ECT / Trouble Codes.
- Read DTCs.
Result
Display (DTC output) Proceed to P0505 A P0505 and other DTCs B HINT:
If any DTCs other than P0505 are output, troubleshoot those DTCs first.
B → GO TO DTC CHART
A: Go to next step
- CHECK PCV HOSE (HOSE CONNECTIONS)
OK
PCV hose is connected correctly and is not damaged.
NG → REPAIR OR REPLACE PCV HOSE
OK: Go to next step
- CHECK AIR INDUCTION SYSTEM
- Check the air induction system for vacuum leakage.
OK
No leakage from air induction system.
NG → REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK: Go to next step
- Check the air induction system for vacuum leakage.
- CHECK THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE)
- Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly.
OK
Throttle valve is not contaminated with foreign objects and moves smoothly.
NG → REPLACE THROTTLE BODY
OK → REPLACE ECM
- Check for contamination between the throttle valve and the housing. If necessary, clean the throttle body. And check that the throttle valve moves smoothly.