p0505
Moderate
Lexus · Sedans
Idle Air Control System Malfunction
Quick Answer
Error code P0505 on your Lexus Sedans means: Idle Air Control System Malfunction. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Clean throttle body thoroughly
2
Inspect all vacuum hoses
3
Test MAF sensor output
4
Check idle air control valve function
5
Perform throttle relearn procedure
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Throttle body cleaner
Vacuum hoses
MAF sensor
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