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.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
C102571Hybrid/EV System, Cooling Heater Relays - Actuator StuckC102571Hybrid/EV System, Cooling Heater Relays - Actuator StuckManufacturer communications
3Original wording in English
MACK
Reported code forms C102571 C102572
Mack Chassis - Battery Electric Vehicle (BEV) Cab Heater Diagnostics. Fault code C102571 and C102572 can be a result of insufficient coolant flowthrough the cab heater system.
VOLVO
Reported code forms C102571
CBR = BEV Fault Code C102571 - Hybrid/EV System, Cooling Heater Relays - Actuator Stuck
MACK
Reported code forms C102571
CBR - BEV Fault Code C102571 - Hybrid/EV System, Cooling Heater Relays - Actuator Stuck
Check vehicle applicability
13A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mack | LR ELECTRIC | 2024 |
| Mack | LR ELECTRIC | 2023 |
| Mack | LR ELECTRIC | 2022 |
| Mack | LR ELECTRIC | 2021 |
| Mack | LRBE (ELECTRIC) | 2025 |
| Mack | LRBE (ELECTRIC) | 2024 |
| Mack | LRBE (ELECTRIC) | 2023 |
| Mack | LRBE (ELECTRIC) | 2022 |
| Mack | LRBE (ELECTRIC) | 2021 |
| Volvo | VNRE (ELECTRIC) | 2024 |
| Volvo | VNRE (ELECTRIC) | 2023 |
| Volvo | VNRE (ELECTRIC) | 2022 |
Before replacing a part
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.
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.