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C053C00

DTC C053C00 indicates the IPB (Intelligent Integrated Brake) system detects one or more wheel speed sensor input signals outside the plausible physical range — Atto 3

Braking System

DTC C053C00 indicates the IPB (Intelligent Integrated Brake) system detects one or more wheel speed sensor input signals outside the plausible physical range.

Specific conditions include: the sensor reports an equivalent vehicle speed exceeding the theoretical maximum vehicle speed (e.g., a frequency corresponding to over 250 km/h); the signal frequency or amplitude exceeds the ECU calibration threshold; or the four-wheel speed logic mismatches (e.g., one wheel speed reads abnormally higher than the others).

This fault triggers the IPB safety protection mechanism, disables functions including ABS, ESC, and Automatic Emergency Braking, and forces the system into degraded mode.

3
Cases Logged
Real-World Cases
BYD DTC AI Analysis

Abnormal air gap in Song PLUS DM-i left rear wheel speed sensor caused signal out of range.

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ABS and ESC warning lights illuminated intermittently during normal driving. Scanner retrieved code C053C00 (left rear wheel). Found the left rear wheel speed sensor mounting bracket deformed from bottoming out, opening the sensor-to-ABS tone ring gap to 2.1mm (out of specification). Reshaped the bracket and adjusted the gap to 0.6mm. Signal returned to normal.
BYD DTC AI Analysis

Tang DM ABS reluctor ring iron filing contamination causes false out-of-range signal

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Vehicle suddenly displayed a brake system fault while driving. Scanned DTC C053C00 (right front wheel). Removed and inspected the right front wheel; found the magnetic encoder ring (ABS tone ring) on the wheel hub bearing covered in brake dust and iron debris. This caused the Hall sensor to detect abnormal magnetic field strength and output a frequency signal outside the IPB processing range. Cleaned the tone ring and replaced the worn brake pads. Fault cleared.
BYD DTC AI Analysis

Han EV IPB wiring harness poor contact causing intermittent wheel speed out-of-range

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ESC warning triggers on rough roads; normal on flat roads. Freeze frame shows right rear wheel speed spiked above 300 km/h (actual speed 60 km/h). Inspection found loose connection at IPB control unit connector terminal A03 (right rear wheel speed signal). Contact resistance increased under vibration, causing abnormal signal amplitude. Re-crimped the terminal and applied conductive paste; fault resolved.
Other Atto 3 Fault Codes
P0A0DBattery Energy Control Module Requested MIL IlluminationP0AA6Hybrid Battery Voltage System Isolation FaultP1A00Drive Motor "A" Performance — BYD proprietaryB1108For the BYD Song MAX (2017–2019), DTC B1108 indicates a short circuit in the PM2.5 air quality detection module (dust sensor) or its wiring harness. The sensor uses laser scattering to detect in-cabin and outside PM2.5 concentrations and transmits data to the HVAC ECU via the LIN bus or an analog signal. Short circuit conditions include: 1) Sensor power supply wire (+5V/+12V) shorted to ground 2) Signal wire shorted to power or ground 3) Short circuit in the sensor's internal photoelectric detection circuit This fault prevents the automatic climate control from switching between fresh air and recirculation based on air quality. The system enters fail-safe mode (typically forced recirculation). Severe short-circuit current can destroy the HVAC ECU sampling circuit. The system classifies this as a Level 3 severe fault and restricts vehicle operation to prevent electrical fires or controller damage. For other BYD models (such as the Qin EV, E5, and Song DM), B1108 indicates a driver-side sunload sensor fault, reflecting differences in DTC definitions across models.B110811This DTC indicates a short circuit in the air conditioning system PM2.5 air quality sensor (rapid detector). Specifically, abnormal continuity exists between the sensor power supply circuit or signal output circuit and body ground or battery positive. This causes the control module (ACU/air conditioning controller) to detect abnormal current or a voltage signal outside the valid range (typically 0V or supply voltage). The PM2.5 sensor monitors internal and external particulate concentrations, providing the data the automatic air conditioning system uses to switch between fresh air and recirculation modes. A short circuit disables the air quality monitoring function. This fault may force the air conditioning system into recirculation protection mode and trigger related thermal management system faults, as the air conditioning system acts as a key actuator in vehicle thermal management. In severe cases, the short circuit current can damage the internal sampling circuit of the air conditioning controller or overheat the wiring harness.
Data confidence: Community This information is for reference only. Always consult a qualified technician for diagnosis and repair. Do not attempt high-voltage system repairs yourself.