Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Honda Clarity Plug-In HybridFACTORY OEM SERVICE PROCEDURE
Electric Servo Brake System DTCS
| DTC | Detection Item | |
|---|---|---|
| B0050 | -F0 | Driver's Seat Belt Buckle Switch Malfunction |
| C0023 | -12 | Brake Diag Circuit ON Failure |
| -14 | Brake Diag Circuit OFF Failure | |
| C0049 | -7A | Brake Fluid Leak or Seal Failure |
| C0062 | -F0 | Longitudinal Acceleration Sensor Malfunction |
| C0063 | -F0 | Yaw Rate Sensor Malfunction |
| C1260 | -7A | Brake Fluid Leak or Seal Failure in Pedal Feel Simulator |
| C1270 | -11 | Automatic Brake Hold Switch Signal Circuit Short |
| -15 | Automatic Brake Hold Switch Signal Circuit Open | |
| P057B | -00 | Brake Pedal Stroke Sensor Circuit Range/Performance Problem |
| P057C | -00 | Brake Pedal Stroke Sensor Circuit Low Voltage |
| P057D | -00 | Brake Pedal Stroke Sensor Circuit High Voltage |
| P05DD | -00 | Brake Pedal Stroke Sensor B Circuit Short to Ground or Open |
| P05DE | -00 | Brake Pedal Stroke Sensor B Circuit Short to Battery |
| P05E0 | -00 | Brake Pedal Stroke Sensor Incorrect Correlation |
| P0602 | -00 | Electric Servo Brake Control Unit Programming Error |
| P0606 | -00 | Electric Servo Brake Control Unit Internal Circuit Malfunction |
| P062F | -00 | Electric Servo Brake Control Unit Internal Circuit EEPROM Error |
| P0642 | -00 | Sensor Power Source Circuit Low Voltage |
| P0643 | -00 | Sensor Power Source Circuit High Voltage |
| P1E20 | -00 | Brake Fluid Pressure Sensor PL/PLR Incorrect Correlation |
| P1E27 | -00 | Brake Fluid Pressure Sensor PU Circuit High Voltage |
| P1E28 | -00 | Brake Fluid Pressure Sensor PU Circuit Low Voltage |
| P1E29 | -00 | Brake Fluid Pressure Sensor PUR Circuit High Voltage |
| P1E2A | -00 | Brake Fluid Pressure Sensor PUR Circuit Low Voltage |
| P1E2B | -00 | Brake Fluid Pressure Sensor PU/PUR Incorrect Correlation |
| P1E2C | -00 | Brake Fluid Pressure Sensor PL Circuit High Voltage |
| P1E2D | -00 | Brake Fluid Pressure Sensor PL Circuit Low Voltage |
| P1E2E | -00 | Brake Fluid Pressure Sensor PLR Circuit High Voltage |
| P1E2F | -00 | Brake Fluid Pressure Sensor PLR Circuit Low Voltage |
| P1E32 | -00 | Master Cylinder Cut Valve Stuck OFF (Stuck Open) |
| P1E33 | -00 | Master Cylinder Cut Valve Incorrect Operation |
| P1E34 | -00 | Master Cylinder Cut Valve Stuck ON (Stuck Close) |
| P1E35 | -00 | Brake Pedal Feel Simulator Cut Valve Incorrect Operation |
| P1E36 | -00 | Brake Pedal Feel Simulator Cut Valve No Operation |
| P1E37 | -00 | Brake Pedal Feel Simulator Cut Valve Stuck OFF (Stuck Close) |
| P1E38 | -00 | Brake Pedal Feel Simulator Cut Valve Stuck ON (Stuck Open) |
| P1E41 | -00 | Electric Servo Brake System Fail-Safe Relay Stuck ON |
| P1E42 | -00 | Electric Servo Brake System Fail-Safe Relay Stuck OFF |
| P1E44 | -00 | Electric Servo Brake Control Unit Internal Circuit Malfunction (Charge Pump Circuit) |
| P1E46 | -00 | Electric Servo Brake Control Unit Internal Circuit Malfunction (FET Stuck ON) |
| P1E47 | -00 | Electric Servo Brake Control Unit Internal Circuit Malfunction (FET Stuck OFF) |
| P1E48 | -00 | Slave Cylinder Drive Motor Current Malfunction (Offset) |
| P1E49 | -00 | Slave Cylinder Drive Motor Current Malfunction (Stuck) |
| P1E4A | -00 | Slave Cylinder Drive Motor Current Malfunction (Over Current) |
| DTC | Detection Item | |
|---|---|---|
| P1E4B | -00 | Slave Cylinder Drive Motor Circuit Open |
| P1E4C | -00 | Slave Cylinder Drive Motor Power Source Circuit High Voltage |
| P1E4D | -00 | Motor Angle Signal Malfunction |
| P1E51 | -00 | Tandem Motor Cylinder Gearbox Mechanical Linkage Failure |
| P1E52 | -00 | Tandem Motor Cylinder Gearbox Stuck |
| P1E63 | -00 | Brake Pedal Stroke Sensor Signal Stuck |
| P1E68 | -00 | Brake Master Cylinder Cut Valve Self Lock |
| P2531 | -00 | Electric Servo Brake Control Unit Power Source Circuit (IG1) Low Voltage |
| P2532 | -00 | Electric Servo Brake Control Unit Power Source Circuit (IG1) High Voltage |
| P25A2 | -00 | Electric Servo Brake Control Unit Requested MIL Illumination |
| U0029 | -00 | F-CAN Malfunction (BUS-OFF) |
| U0047 | -00 | F-CAN Malfunction (Ch2 Bus-OFF) / Vehicle Communication Bus C Performance |
| U0100 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Management ECU) |
| U0101 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With TCM/PCM(Gear System)) |
| U0104 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Driving Support System Control Unit) |
| U0111 | -00 | Lost communication With Battery Energy Control Module A |
| U0122 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With VSA Modulator-control Unit) |
| U0128 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Electric Parking Brake Control Unit) |
| U0146 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With CAN Gateway) |
| U0151 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With SRS Unit) |
| U0155 | -00 | F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Gauge Control Module) |
| U0401 | -68 | PGM-FI/ECM/PCM System Malfunction |
| U0415 | -68 | ABS System Malfunction |
| U0416 | -68 | VSA System Malfunction |
| U0417 | -68 | Electric Parking Brake System Malfunction |
| U3000 | -49 | Driver's Door Switch Signal Stuck On (ECU Internal Malfunction) |
| U3003 | -16 | Electric Servo Brake Control Unit Power Source Circuit (+B) Low Voltage |
| -17 | Electric Servo Brake Control Unit Power Source Circuit (+B) High Voltage | |
| U3003 | -92 | System Voltage Low(Long Term) |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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