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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Engine Control System - Diagnostic Codes (P0520-P0627)) >> SFI System >> DTC P0597-14: Thermostat Heater Control Circuit Short to Ground or Open [03/2023 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.
Thermostat heater output terminal voltage level Low
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