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DTC P1607: Powertrain Control Module (Pcm) Internal Circuit Failure

WARNING: This page is about a different car, the 2000 Acura Integra. However, it is still accessible from the selected car via links, so may be relevant.

Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition on. Wait 10 seconds. If DTC P1607 does not reset, problem is intermittent. System is okay at this time. If DTC P1607 resets, substitute a known-good PCM and recheck. If symptom or problem goes away, replace original PCM.

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