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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Heating / Air Conditioning System - Diagnostic Codes (3 Of 3), Circuit Tests & Symptom Tests) >> AIR CONDITIONING SYSTEM (for PHEV Model) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message; DTC U0198-87: Lost Communication with Telematic Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [08/2023 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
U0100

Communication signal Lost communication with ECM
U0111

Communication signal Lost communication with battery ECU assembly
U0293

Communication signal Lost communication with hybrid vehicle control ECU
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