Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P2BC5:00OBC Contactor (+) system: Stuck On
Manufacturer communications
4Original wording in English
MERCEDES-BENZ
Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High‐voltage on board electrical system The following fault codes related to stuck contactor can be found in the High Voltage Control units : PTCU ‐ N127 (Powertrain control unit) • P154900 ‐ There is a warning due to overcurrent in t…
MAZDA
DESCRIPTION Some vehicles may experience the warning message "A 'Hybrid System Malfunction. Have the Vehicle Inspected' and DTC P2BC5:00 (OBC contactor (+) stuck ON) and/or other DTCs listed below may be stored. If this condition is present, follow the Repair Procedure below to replace the Junction Box No.2. P2BC5:00: OBC Contac…
MERCEDES-BENZ
Vehicle not starting after DC charging Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High-voltage on board electrical system The following fault codes related to stuck contactor can be found in the High Voltage Control units : PTCU - N127 (Powertrain control unit) • P154900 - The…
MERCEDES-BENZ
Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High-voltage on board electrical system The following fault codes related to stuck contactor can be found in the High Voltage Control units : PTCU - N127 (Powertrain control unit) • P154900 - There is a warning due to overcurrent in t…
Check vehicle applicability
48A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mazda | CX-70 ↗ | 2026 |
| Mazda | CX-70 ↗ | 2025 |
| Mazda | CX-90 ↗ | 2026 |
| Mazda | CX-90 ↗ | 2025 |
| Mazda | CX-90 ↗ | 2024 |
| Mercedes-Benz | AMG E 53 4MATIC+ WAGON ↗ | 2025 |
| Mercedes-Benz | AMG E 53 E 4MATIC+ ↗ | 2025 |
| Mercedes-Benz | AMG E53E ↗ | 2023 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.