AU
P060500

DTC P060500 indicates a self-check error in the read-only memory (ROM/Flash) inside the Intelligent Power Brake (IPB) electro-hydraulic control module — Atto 3

Braking System

DTC P060500 indicates a self-check error in the read-only memory (ROM/Flash) inside the Intelligent Power Brake (IPB) electro-hydraulic control module.

This internal control module fault means the IPB ECU detected a checksum error, data corruption, or physical hardware fault during the start-up self-check.

This affects the non-volatile memory (typically Flash ROM or EEPROM) storing the brake control program, calibration data, and fault information.

The IPB is the core component of the BYD One Box brake-by-wire system.

It integrates conventional ABS, ESC (Electronic Stability Control), EPB (Electronic Parking Brake), Automatic Emergency Braking (AEB), and energy recovery functions.

A ROM error forces the IPB system into a safety fallback mode (limp home).

This mode may fully or partially disable ESC, AEB, and EPB functions, retaining only basic hydraulic braking capability and severely compromising driving safety.

Common causes include software corruption, hardware defects, abnormal power loss, electromagnetic interference, or physical memory damage from prolonged high-temperature exposure.

4
Cases Logged
5
Causes
Likely Causes — Atto 3
  • 1IPB electro-hydraulic module internal software corruption, program crash, or checksum verification failure (e.g., interrupted software flashing).
  • 2IPB control unit hardware fault, such as a ROM chip cold solder joint, physical damage, or internal circuit aging.
  • 3A depleted 12V low-voltage battery, unstable voltage, or momentary power loss causes the IPB module to reset abnormally and corrupt ROM data.
  • 4Strong electromagnetic interference (e.g., from nearby high-power equipment) or electrostatic discharge (ESD) damaging the control module internal memory circuit.
  • 5IPB module manufacturing defect, or prolonged operation in high-temperature, high-humidity environments causing memory lifespan degradation.
What To Do
  • 1
    Use the VDS2000/VDS3000 dedicated diagnostic tool to read all fault codes, freeze frame data, and the IPB system status to confirm if the fault is active.
  • 2
    Check the 12V low-voltage battery voltage (static ≥12.4V, starting ≥11V, charging ≥13.5V) to confirm power supply system stability and rule out voltage fluctuations.
  • 3
    Check the IPB module power supply circuit (focusing on fuse F4/9 and socket), the ground circuit (tightness of ground point G09), and the CAN communication lines (CAN-H and CAN-L resistance 60 Ω, voltage approximately 2.5 V).
  • 4
    Attempt to clear the fault code, perform the IPB system self-check and yaw rate sensor calibration, and observe if the fault recurs.
  • 5
    Consult the BYD TPI technical bulletin and check the IPB software version. If an update is available, reflash or reprogram the software.
  • 6
    If P060500 persists after the software update, the IPB electro-hydraulic module has a hardware fault. Replace the IPB assembly (integrated brake master cylinder module with ECU).
  • 7
    After replacing the IPB module, perform the following procedures in sequence: brake line bleeding (requires the diagnostic tool-assisted bleeding procedure), yaw rate sensor calibration, longitudinal acceleration sensor calibration, EPB matching, and pedal feel calibration.
  • 8
    Perform a road test to verify ABS activation, ESC intervention, EPB clamp/release, and Automatic Emergency Braking functions. Confirm no fault codes are present and the instrument cluster warning lights are off.
Real-World Cases
BYD DTC AI Analysis

Song PLUS DM-i IPB communication fault accompanied by ROM error

✓
While driving, the ABS and ESC warning lights suddenly illuminated. VDS retrieved P060500 (ROM Error) and U0100 (Lost Communication with IPB). Inspection found a loose bolt at the IPB module G09 ground point and backed-out pins at G09-14/15 on the CAN lines. Poor grounding and interrupted communication caused the IPB module to reset abnormally, triggering ROM data checksum failure. Retightening the ground bolt, repairing the CAN terminals, and clearing the codes resolved the fault.
Original source ↗
BYD DTC AI Analysis

Tang DM-i brake system software corruption caused ROM self-test failure

✓
The owner reported the instrument cluster displayed "Check Braking System" while driving. Brake pedal felt normal but ESC function was limited. VDS detected DTC P060500. The IPB had early-version software with a known ROM management defect; power and communication checks were normal. Diagnosed software corruption. Reflashed IPB to the latest version using VDS and cleared the DTC. System self-test passed. Road-tested 30 km with no recurrence.
Original source ↗
BYD DTC AI Analysis

Han EV IPB Electro-Hydraulic Module Hardware Failure Replacement Case

✓
After parking, the vehicle would not enter OK mode and multiple brake system warning lights stayed on. The scan tool retrieved code P060500 and could not communicate with the IPB. Battery voltage measured 12.46V (normal), IPB power supply fuse F4/9 tested good, and CAN bus resistance and voltage tested normal. Power reset and software reflash attempts failed. Diagnosed as hardware damage to the IPB internal ROM chip. Replaced the IPB electro-hydraulic module assembly, performed brake bleeding, sensor calibration and EPB matching. Vehicle function returned to normal.
Original source ↗
BYD DTC AI Analysis

Intermittent IPB power supply fault while driving causes ROM error in Song Pro DM-i

✓
The ESC warning light illuminated intermittently at highway speeds, accompanied by a 'Check brake system' message. The fault occasionally cleared after restarting the engine. Deep scan revealed stored DTC P060500. Inspection found poor contact in the IPB power supply fuse F4/9 holder. Road vibration caused momentary power loss (voltage drop) to the IPB module, corrupting the ROM data. Repaired the fuse holder contact surface and replaced the damaged IPB module (repeated abnormal power cuts caused physical damage to the internal ROM). Fault completely resolved.
Original source ↗
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: Official This information is for reference only. Always consult a qualified technician for diagnosis and repair. Do not attempt high-voltage system repairs yourself.