Home >> Toyota >> 2021 >> Camry TRD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System (UA80E) - Diagnostic Codes (3 Of 3) & Circuit Tests (Except Hybrid) >> Automatic Transaxle System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [06/2017 - 08/2018] >> Typical Malfunction Thresholds