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Home › Mazda › 2002 › MX-5 Miata Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P1601: Pcm-TCM Communication Line Error › Detection Condition

Detection Condition

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.