AU
P060B00

DTC P060B00 indicates a performance fault in the A/D (analog-to-digital) conversion control module inside the IPB (Intelligent Power Brake/Integrated Power Brake) system ECU — Qin Plus

Braking System

DTC P060B00 indicates a performance fault in the A/D (analog-to-digital) conversion control module inside the IPB (Intelligent Power Brake/Integrated Power Brake) system ECU.

The IPB ECU uses the A/D converter to acquire real-time analog signals from the brake pedal travel sensor, brake master cylinder pressure sensor, wheel cylinder pressure sensor, motor current sensor, and temperature sensor.

It converts these into digital signals for the processor to calculate brake force distribution and regenerative braking coordination.

The ECU triggers this DTC if its self-check detects reference voltage drift in the A/D conversion circuit, reduced sampling accuracy, conversion logic errors, or if the internal monitoring circuit detects abnormal A/D conversion timing.

This fault forces the braking system into a safety fallback mode (limp mode) and may restrict or disable ABS, ESC, Automatic Emergency Braking (AEB), and parking system functions.

This is a brake safety-critical fault.

5
Cases Logged
5
Causes
Likely Causes — Qin Plus
  • 1Hardware fault in the IPB ECU internal A/D converter chip, reference voltage source, or signal conditioning circuit (aging, overvoltage breakdown, or cold solder joint)
  • 2Abnormal IPB supply voltage (overvoltage, undervoltage, or severe fluctuation in the vehicle 12V power supply system) causes A/D conversion reference voltage Vref instability.
  • 3External sensor wiring short circuit (short to 12V power supply or ground) causing A/D input port overload damage or clamping.
  • 4IPB control unit software defect, calibration data corruption, or Flash memory error causing a false detection by the A/D self-check algorithm.
  • 5Strong electromagnetic interference (such as poor high-voltage system insulation or high-power radio interference) causes A/D sampling signal distortion.
What To Do
  • 1
    Use VDS2000 or the latest diagnostic tool to read the complete fault code freeze frame. Check for accompanying CXXXXX series pressure sensor or position sensor fault codes. Record the current IPB software and hardware versions.
  • 2
    Check the IPB electro-hydraulic module power supply voltage: Measure the constant power (+B), ignition power (IG1), and ground (GND). Verify the static voltage is 12.0-12.6V, dynamic voltage is at least 10.5V, ground resistance is less than 0.5Ω, and there is no voltage drop or ripple voltage.
  • 3
    Check the brake pressure sensor, pedal position sensor, and other analog signal sensors, and verify their wiring harness continuity. Measure the sensor output signal voltage range (typically 0.5-4.5V) to rule out a short to power, short to ground, or signal crosstalk.
  • 4
    Flash the IPB ECU software to the latest version (via OTA online upgrade or offline flashing). Some early software versions contain an A/D sampling compensation algorithm defect.
  • 5
    If the software flash fails, replace the IPB electro-hydraulic brake assembly with ECU (the part number must match the vehicle configuration). After replacement, perform: ① Brake line bleeding procedure ② Pressure sensor zero-point calibration ③ Pedal position sensor learning.
  • 6
    Clear all fault codes. Perform a static function test (power-on self-test) and a dynamic road test (ABS activation test, regenerative braking test) to verify P060B00 does not recur and the brake system shows no abnormal warnings.
Real-World Cases
BYD DTC AI Analysis

BYD Song PLUS DM-i: IPB internal ADC monitoring fault caused ESC failure

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While driving normally, the ESC, ABS and brake system warning lights illuminated simultaneously. The instrument cluster displayed "Brake System Fault". The vehicle remained drivable but automatic emergency braking was disabled. VDS scan showed P060B00 (Internal A/D Control Module Fault) with C003708 (Master Cylinder Pressure Sensor Signal Abnormal). IPB supply voltage measured 12.4V (normal) and sensor wiring showed no shorts or opens. Reflashed IPB software to the latest version; fault persisted. Diagnosis: hardware failure in the IPB ECU internal A/D conversion circuit. Replaced the IPB electro-hydraulic brake assembly (with ECU) and performed brake line bleeding and pressure sensor calibration. Fault cleared; all functions returned to normal.
Original source ↗
BYD DTC AI Analysis

Song Max IPB poor ground causing intermittent P060B00 fault

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The brake system warning light illuminated intermittently. When the fault occurred, the brake pedal became stiff and brake assist dropped significantly. Diagnosis revealed the IPB ECU ground wire bolt at the left front longitudinal beam ground point had loosened, causing ground resistance to fluctuate between 0.8–15 Ω. This caused the A/D conversion reference voltage to drift with load current changes, triggering the internal monitoring fault. After sanding the ground point and tightening the ground wire bolt to the specified torque of 10 N·m, ground resistance fell below 0.3 Ω and the fault did not recur. This case demonstrates that power supply grounding abnormalities cause false A/D module fault reports.
Original source ↗
BYD DTC AI Analysis

Tang DM Transmission Control Unit P060B00 Fault Reference (A/D Conversion Mechanism Similarity)

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Although this case comes from the transmission control unit (TCU), the P060B00 fault mechanism closely resembles the IPB system: both involve abnormal A/D conversion performance inside the control unit. Symptoms include harsh shifting and abnormal clutch control. The repair procedure: first check the TCU power and ground circuits, then try a TCU software update or reflash. If that fails, replace the transmission control unit and program it online. This diagnostic sequence (circuit check → software reflash → hardware replacement) fully applies to P060B00 faults in IPB brake systems.
Original source ↗
BYD DTC AI Analysis

Technical Reference: P060B Internal Control Module Fault Repair Logic for Generic Models

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Based on P060B repair experience from other brands' powertrain control modules (PCM): symptoms include multiple system warning lights on, rough idle, and reduced functionality. Standard repair procedure: ① Thoroughly inspect PCM power supply, ground, and CAN communication circuits ② Flash/program the control unit software ③ If the fault persists, replace the control unit and perform immobilizer matching and configuration programming. This standardized procedure also applies to P060B00 faults in BYD IPB systems, significantly cutting diagnostic time.
Original source ↗
BYD DTC AI Analysis

Qin Pro DM Brake System Hard to Start Associated with IPB A/D Fault

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When starting the vehicle, the brake pedal was too stiff to depress, or if depressed, the vehicle would not enter Ready mode (high-voltage system stayed off). The instrument cluster displayed "Brake System Fault". VDS read DTC P060B00 (Internal A/D Control Module Fault). Inspection found an intermittent failure in the IPB ECU's A/D conversion circuit, causing erratic brake pedal position and master cylinder pressure signals. The safety system flagged this as a serious brake fault and prevented the vehicle from starting. Software flash failed. Replaced the IPB electro-hydraulic brake module assembly and completed online programming and sensor calibration. The vehicle now starts and brakes normally.
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.