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• 19:01, 6 July 2026 Cliff talk contribs created page Code 35 (Created page with "'''Code 35''' is a diagnostic trouble code related to idle speed control on the Pontiac Fiero. Code 35 indicates that the ECM cannot maintain the expected idle speed. == Overview == The ECM controls idle speed by adjusting the amount of air bypassing the throttle plate. On Fieros equipped with an idle air control system, this is handled through the Idle air control valve, often abbreviated as IAC. Code 35 is set when the actua...")