DTC P0607: Powertrain Control Module (Pcm) Internal Circuit Failure (2004 3.5RL)
WARNING: This page is about a different car, the 2004 Acura 3.5RL, 2003 Acura 3.5RL, 2002 Acura 3.5RL, and 2001 Acura 3.5RL. 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 switch ON (II) for at least 3 seconds. If DTC P0607 resets, substitute a known-good PCM, and recheck. If symptom or indication goes away, replace original PCM. If DTC P0607 does not reset, problem is intermittent. System is okay at this time.