PowertrainP0B42
CautionSeverity: Caution - get it checked when you can
Hybrid/EV Battery Voltage Sense B Circuit Low
Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
The electrical system may fail and the battery may go flat, risking a stall. If the battery or charging warning light is on, drive straight to a workshop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 28
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| BAIC Motor | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Mercedes-Benz | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| BYD | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Chery | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Chrysler | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Daewoo | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| DFFS | P0B42 | Under status, short circuit to ground Brand | Powertrain |
| DFFX | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| DFXK | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| EOBD | P0B42 | Litar voltan deria 'B' bateri Hibrid/EV rendah Brand | Powertrain |
| Ford | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Geely | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| GM | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Great Wall | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Hafei | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Holden | P0B42 | Hybrid/EV Battery 2 Circuit Low Voltage Brand | Powertrain |
| Honda | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Hyundai | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Isuzu | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Land Rover | P0B42 | Hybrid/electric vehicle battery - Voltage - Sense B - Circuit low Brand | Powertrain |
| Mazda | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Opel | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Peugeot | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Saab | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| MG (SAIC) | P0B42 | Hybrid Battery Voltage Sense 'B' Circuit Low Brand | Powertrain |
| Subaru | P0B42 | Hybrid/EV Battery Voltage Sense B Circuit Low SAE | Powertrain |
| Toyota | P0B42 | Under status, short circuit to ground Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 1
These 7-character codes are manufacturer-specific variants of P0B42 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P0B4200 | Sensor B for battery voltage of the high-voltage battery has a short circuit to ground. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P0B4xx codes.