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P060600

In the BYD IPB (Intelligent Power Brake) system, DTC P060600 indicates a self-check failure of the ECU control processor inside the electro-hydraulic brake module — Qin Plus

Braking System

In the BYD IPB (Intelligent Power Brake) system, DTC P060600 indicates a self-check failure of the ECU control processor inside the electro-hydraulic brake module.

Specifically, the microcontroller unit (MCU) inside the IPB assembly detects a core component failure during the power-on self-test (POST) or runtime monitoring.

This indicates an anomaly in the CPU arithmetic unit, internal RAM/ROM, clock oscillator circuit, power supply monitoring circuit, or watchdog reset circuit.

The IPB system integrates critical functions including brake boost, Electronic Stability Control (ESC), Anti-lock Braking System (ABS), and regenerative braking force distribution.

Consequently, this fault results in a hard brake pedal (loss of electric brake boost), complete failure of ESC/ABS functions, and disabled Automatic Emergency Braking (AEB).

In extreme cases, the fault triggers brake system degradation protection and forces the vehicle into limp mode.

This constitutes a hardware-level or low-level software fault; clearing the DTC will not resolve the issue.

5
Cases Logged
5
Causes
Likely Causes — Qin Plus
  • 1Abnormal IPB supply voltage: Unstable 12V permanent power or IGN power supply, or excessive fuse/relay contact resistance causes internal ECU voltage to drop below 9V or exceed 16V, triggering a processor protection fault.
  • 2IPB ECU internal hardware damage: physical damage to the main control chip (such as an Infineon or Renesas MCU), PCB cold solder joints, crystal oscillator failure, flash memory bad blocks, or power management IC (PMIC) failure.
  • 3Software malfunction: IPB control program infinite loop, memory overflow, watchdog reset failure, or intermittent program runaway due to software version defects (common in early software versions).
  • 4Communication bus interference: CAN bus (powertrain or chassis network) error frame overload or abnormal terminating resistance causes an IPB processor communication timeout and triggers fault protection.
  • 5Environmental factors: High front compartment temperature; wading or poor sealing causing moisture and corrosion on the internal IPB PCB; oxidation and water ingress at the connectors (especially the 24-pin main plug) causing a signal short circuit.
What To Do
  • 1
    Fault confirmation and freeze frame analysis: Use VDS2000 or Launch X431 to read all fault codes. Confirm whether P060600 is an active or historic code. Record key freeze frame parameters, such as vehicle speed, supply voltage, and temperature. Check for accompanying fault codes, such as U0100 (Lost Communication with IPB).
  • 2
    Basic circuit inspection: Turn off the ignition switch. Measure the voltage between pin 1 (constant power 30) of the IPB module 24-pin connector and body ground (should be 12V ± 0.5V). Measure the voltage at pin 8 (ignition power 15) with the ignition switch in the ON position. Measure the resistance between pins 23/24 (ground) and the body (should be less than 1Ω). Check the condition of IPB-related fuses, such as F1/23 and F2/11 in the engine compartment fuse box, and the relay contacts.
  • 3
    Communication bus check: Use an oscilloscope to measure the IPB CAN-H (pin 16) and CAN-L (pin 15) waveforms. Check for waveform distortion, abnormal voltage (normal CAN-H 2.5-3.5V, CAN-L 1.5-2.5V), or error frames. Measure the termination resistance (approximately 60Ω).
  • 4
    Software update and reset: For intermittent faults, clear the fault code and update the IPB software to the latest version (for Song PLUS DMi, confirm the software version is TMC_XXX or higher). Perform an ECU reset and observe if the fault recurs.
  • 5
    Component Replacement and Verification: If the fault persists, replace the IPB assembly (electro-hydraulic module with ECU, e.g., part number 6A-3501010-XX). After replacement, use VDS to perform Online Coding, VIN writing, and immobilizer matching.
  • 6
    System calibration and bleeding: After replacing the IPB, you must perform ESC system calibration (steering angle sensor, lateral/longitudinal acceleration sensor, and pressure sensor calibration), brake pedal position learning, and hydraulic line bleeding (requires dedicated bleeding equipment and DOT4 brake fluid).
Real-World Cases
BYD DTC AI Analysis

IPB power supply relay failure on Song PLUS DM-i caused P060600

✓
Vehicle arrived with the instrument cluster displaying "Braking System Fault" and "ESC Fault". VDS read current DTCs P060600 and U010008 (lost communication with IPB). Voltage at pin 1 of the IPB module 24-pin connector fluctuated between 10.2V and 11.8V, below normal. Further inspection found severe contact burn on the IPB power supply relay (RLY-03) in the engine compartment fuse box, with contact resistance at 8Ω. After replacing the relay, voltage recovered to 12.4V. Clearing the DTCs, P060600 did not reappear and brake assist returned to normal.
BYD DTC AI Analysis

IPB software version defect caused intermittent control processor fault

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Customer reported the vehicle occasionally displayed a brake system warning on startup after overnight parking; the warning cleared after driving a short distance. VDS showed P060600 as a history fault; IPB software version was TMC_V1.02 (early 2021 version). Technical bulletins indicate this version has a memory management defect that can trigger processor self-test errors during cold starts between -5°C and 5°C. Upgraded IPB software to TMC_V1.08. One month of monitoring showed no fault recurrence.
BYD DTC AI Analysis

Water entered the IPB after wading, damaging the control processor

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After wading through water approximately 40 cm deep, multiple brake warning lights illuminated on the instrument panel. Current DTC P060600 was stored and would not clear. Inspection revealed the waterproof sealing grommet at the IPB mounting location (near the left front side member) had dislodged. Opening the IPB housing revealed obvious water staining and corrosion on the PCB, particularly verdigris around the MCU circuitry. Internal power module output was abnormal—the 3.3 V rail measured only 1.8 V. Replaced the IPB assembly with a new unit and resealed the waterproofing. Fault resolved.
BYD DTC AI Analysis

Electromagnetic interference from high-power aftermarket audio system triggered P060600

✓
After installing a high-power amplifier, the instrument cluster occasionally reported a braking system fault when volume was high or during heavy bass. VDS logged P060600 and multiple communication timeout DTCs. Inspection found the modified power harness bundled parallel to the IPB CAN harness on the left side of the front compartment without shielding. Oscilloscope readings revealed high-frequency interference ripple on the CAN bus. Rerouting the audio harness to keep it over 30cm from the IPB wiring and fitting ferrite cores to the CAN lines eliminated the fault.
BYD DTC AI Analysis

IPB internal ECU main board hardware damaged from aging

✓
120,000 km, no collision history. Sudden brake pedal hardening (loss of electric assist) with persistent P060600 current fault code. Power supply, ground and communication circuits tested normal. CAN bus communication normal but IPB internal data stream showed abnormal processor status. Disassembled IPB assembly and found multiple micro-cracks in solder joints around the main control chip (Renesas RH850) on the internal main board from long-term thermal cycling fatigue. Replaced IPB assembly and performed full calibration. Fault eliminated.
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.