DTC codes / Ford codes / P1507
P1507 on Ford vehicles means the powertrain control module (PCM) commanded a specific idle speed through the idle air control (IAC) valve but the actual engine speed stayed below the expected target for a calibrated amount of time. The computer is not reporting a failed valve directly; it is reporting that engine rpm did not respond to the IAC command as expected during idle control.
Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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