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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Electronically Controlled Brake System - Diagnostic Codes (4 Of 6)) >> Electronically Controlled Brake System (For Hev Model) >> Dtc C1256-09: Accumulator Low Pressure Abnormality Component Failure [11/2021 - 03/2024] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
Related DTCS C1256: Brake Booster Motor Pressure Too Low
Required Sensors/Components (Main) Brake Booster With Accumulator Pump Assembly
Brake Actuator (Brake Booster With Master Cylinder Assembly)
Required Sensors/Components (Related) No. 2 Skid Control ECU (Brake Actuator Assembly)
Brake Actuator (Brake Booster With Master Cylinder Assembly)
Stop Light Switch Assembly
Frequency Of Operation Continuous
Duration 1.698 To 9 Seconds (Time Depends On Auxiliary Battery Voltage): C1256 (Case 1-1)
3 Seconds: C1256 (Case 1-2)
33 To 99 Seconds (Time Depends On Auxiliary Battery Voltage): C1256 (Case 1-3)
Mil Operation Immediately
Sequence Of Operation None
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