Code Definition

C0899 — Power Supply Circuit Low Voltage

System: Chassis  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About C0899

C0899 is a generic (obd-ii standard) chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C0899 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

Because C0899 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Electronic Brake Control Module (EBCM) monitors its battery and ignition feed circuits to confirm there is sufficient operating voltage for the ABS and stability control systems. DTC C0899 is set when the module detects system voltage below the calibrated minimum threshold for a specified time. This condition commonly appears during cranking, under heavy electrical load, or when the charging system output is low, rather than from a fault inside the module. While the voltage is low the EBCM may temporarily or, if the fault persists, continuously disable ABS, traction control, and stability ...

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