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 — Qin Plus

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.

The P060500 fault code on the Qin Plus indicates an internal ROM/Flash self-check error in the IPB electro-hydraulic brake control module. Severity is medium because the system may enter limp mode, reducing ESC, AEB, EPB, or energy recovery functions while keeping basic braking. Common causes include software corruption after interrupted flashing or an internal IPB hardware fault. Visit an authorised dealer for diagnosis and repair. Typical repair cost data is available.
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Cases Logged
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Causes
Likely Causes — Qin Plus
  • 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 dry solder joints on the ROM chip, physical damage, or internal circuit aging.
  • 3A discharged 12V low-voltage battery, unstable voltage, or momentary power loss causes the IPB module to reset abnormally and corrupt the ROM data.
  • 4Strong electromagnetic interference (such as nearby high-power equipment) or electrostatic discharge (ESD) causes breakdown of the control module internal memory circuit.
  • 5IPB module manufacturing defect, or memory life degradation from long-term operation in high-temperature and high-humidity environments.
What To Do
  • 1
    Use the VDS2000/VDS3000 dedicated diagnostic tool to read all fault codes, freeze frame data, and IPB system status to confirm if the fault is continuous.
  • 2
    Check the 12V low-voltage battery voltage (static ≥12.4V, starting ≥11V, charging ≥13.5V) to verify power supply system stability and eliminate voltage fluctuations.
  • 3
    Check the IPB module power supply circuit (focusing on the F4/9 fuse 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
    Check the BYD TPI technical bulletin and the IPB software version. If an update is available, perform a software reflash or reprogramming.
  • 6
    If P060500 remains after the software update, this indicates a hardware fault in the IPB electro-hydraulic module. Replace the IPB assembly (integrated brake master cylinder module with ECU).
  • 7
    After installing a new IPB module, perform the following 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 the automatic emergency braking function. 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 Qin Plus Fault Codes
B1108For 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.B110913DTC B110913 indicates an open signal circuit for the PM2.5 rapid detector (in-cabin air quality sensor). This sensor typically mounts inside the air conditioning system intake duct. It monitors in-cabin PM2.5 concentration in real time and provides data to the automatic air conditioning system for intelligent control of the air purification function. The BYD diagnostic protocol uses sub-code '13' to specifically indicate an open signal circuit. Although this fault theoretically affects a comfort feature, BYD Qin series vehicles classify it as a Level 3 (severe) fault. This classification occurs because the air conditioning system interacts with the battery thermal management system (e.g., monitoring battery cooling intake air quality). The fault can disable the automatic air conditioning mode and prevent the air purification function from operating. In extreme cases, it affects the battery compartment intake air quality assessment, triggering the 'repair immediately' strategy.B110BDTC B110B indicates a fault in the internal air pump (sampling pump) of the PM2.5 air quality detector. This pump draws cabin or outside air into the PM2.5 sensor detection chamber, enabling the laser scattering sensor to measure real-time particulate matter concentration. The air conditioning controller (or BCM) sets this DTC upon detecting an open or short circuit in the pump drive circuit, or abnormal current caused by a seized pump motor. This fault disables the "Green Clean" system, causes the instrument cluster air quality display to read abnormally or disappear, and disables the automatic fresh air/recirculation switching function. It does not affect the vehicle powertrain or core thermal management functions.B173A1ADTC B173A1A indicates the right middle-row side airbag (typically located on the side of the right second-row seat or inside the C-pillar trim panel) igniter circuit resistance measures 0 Ω. In the Supplemental Restraint System (SRS), normal airbag igniter resistance ranges between 2.0 and 5.0 Ω. A resistance of 0 Ω indicates a short to ground or a short between circuit wires, preventing the Airbag Control Unit (ACU) from establishing a normal monitoring circuit. This safety-critical fault prevents the airbag from deploying during a collision, continuously illuminates the instrument panel SRS warning lamp, and may force the entire airbag system into fail-safe mode.B173BDTC B173B indicates an abnormal electric A/C compressor speed feedback signal or a communication fault between the compressor controller and the motor. In BYD new energy models (e.g., Tang, Song, Qin, and Yuan series), this DTC belongs to the HVAC subsystem within the Body Control system and specifically involves the electric compressor closed-loop control circuit. The ECU sets this DTC when the compressor controller (IPM) fails to receive a valid pulse signal from the Hall speed sensor for more than 3 continuous seconds, or when the deviation between the detected actual speed and the target commanded speed exceeds the calibrated threshold (typically >500 rpm). This fault forces the A/C system into fail-safe mode and stops compressor operation. Symptoms include a complete lack of cooling, intermittent cooling, or a sharp decrease in cooling performance. The instrument cluster A/C warning lamp may also illuminate. Prolonged operation with this fault can degrade high-voltage system insulation or cause controller overcurrent damage.
Common problems reported for Qin Plus →Qin Plus overview →
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.