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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0505: Idle Air Control (IAC) System Circuit >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. If any other DTCs are displayed, diagnose and repair those DTCs first and retest. If only DTC P0505 is displayed, go to next step.
  2. Ensure oil dipstick, oil filler cap, PCV system and all other air induction system components are intact and operating properly. If problem exists, repair as necessary. If problem does not exist, go to next step.
  3. Check Electronic Throttle Control System (ETCS). See THROTTLE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article. Replace components as necessary.
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