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Home >> Mazda >> 2003 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 25 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1601: Pcm-TCM Communication Line Error >> Detection Condition

Detection Condition

WARNING: This page is about a different car, the 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when there is no communication between Powertrain Control Module (PCM) and Transmission Control Module (TCM). Open or short circuit between PCM and TCM.

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