DTC P1607: Powertrain Control Module (Pcm) Internal Circuit

FAILURE "A"

Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition on and 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 problem goes away, replace original PCM.