Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

The detection of DTC P0505 may also be caused by: 1) the floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed (throttle position to be slightly open); or 2) the accelerator pedal not being fully released.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505)

Result

RESULT CHART

Display (DTC output)	Proceed to
P0505	A
P0505 and other DTCs	B

B: GO TO RELEVANT DTC CHART

A: Go to next step

CHECK CONNECTION OF PCV HOSE
NG: REPAIR OR REPLACE PCV HOSE

OK: Go to next step
CHECK AIR INDUCTION SYSTEM
NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM

OK: Go to next step
CHECK THROTTLE VALVE
1. Check the throttle valve condition.
NG: REPLACE THROTTLE BODY

OK: REPLACE ECM