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DTC P1607: Powertrain Control Module (Pcm) Internal Circuit Failure (2001-03 3.5RL)

NOTE: PCM is part of the immobilizer system. When substituting a known-good PCM, rewrite vehicle immobilizer code to replacement PCM using Honda PGM tester, or engine will not start.

Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition switch ON (II). Wait 3 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 indication goes away, replace original PCM.

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