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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
Real-World Cases
BYD DTC AI Analysis

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

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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

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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

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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.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.B1109DTC B1109 indicates an open circuit in the communication line between the air conditioning system PM2.5 air quality sensor (dust concentration sensor) and the air conditioning control unit (AC ECU), or an open circuit within the sensor internal circuitry. Typically located in the air conditioning intake duct, this sensor monitors real-time PM2.5 particle concentration inside and outside the vehicle. It provides data to the automatic air conditioning system for intelligent switching between fresh air and recirculation modes and for controlling the air purification device. During an open circuit fault, the AC ECU cannot receive the air quality signal, triggering the system fail-safe mode. Symptoms typically include failure of the automatic recirculation function, abnormal air purification indicator light operation, or abnormal air quality data displayed on the air conditioning panel. Severe cases may compromise the cabin environment control strategy, but do not directly affect vehicle driving safety.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.B110AThis DTC indicates interrupted CAN bus communication or abnormal data between the air conditioning control unit (ACU) and the PM2.5 air quality sensor. The PM2.5 sensor monitors particulate concentration inside and outside the vehicle and provides the basis for purification control in the automatic air conditioning system. The ACU triggers this fault if it fails to receive a valid CAN message from the sensor within the specified period (usually 100-500 ms), if message verification fails, or if the signal frame times out. Although this fault does not affect vehicle driving safety, it disables the automatic air purification function. The air conditioning system cannot automatically switch between recirculation and fresh air modes or activate the air purification mode based on air quality. A persistent fault may restrict the thermal management strategy.
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.