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DTC P0507: Idle Control System Rpm Higher Than Expected

  1. Turn ignition off. Connect scan tool. Retrieve DTCs. If DTCs P0505 or P1505 exist on 2.2L and Legacy 2.5L M/T (P1510, P1511, P1512, P1513, P1514, P1515, P1516 or P1517 on all other vehicles), diagnose those DTCs only. Do not diagnose DTC P0507. If DTC P0507 is only DTC set, go to next step.
  2. Start and allow engine to idle. Check intake manifold, idle air control (IAC) solenoid valve and throttle body for loose installation or defective gaskets. Check by-pass hoses for loose connection or cracking and vacuum hoses for disconnection or cracking. Repair as necessary and go to next step. If no damage is noted, replace IAC solenoid valve.
  3. Check throttle cable play and adjust as necessary. See ON-VEHICLE ADJUSTMENTS article. On all vehicles except 2.2L and Legacy 2.5L M/T, turn ignition off. Remove IAC solenoid valve from throttle body. Check for foreign particles in by-pass air line. Remove foreign particles as necessary. If no foreign particles are present, replace IAC solenoid valve.
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