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.
P108664Charging Switch Unit B, Voltage Supply, Signal Plausibility FailureP108664Charging Switch Unit B, Voltage Supply, Signal Plausibility FailureManufacturer communications
8Original wording in English
VOLVO
Reported code forms P108664
CBR: Battery Electric Vehicle (BEV) DTC P108664 - Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure.
MACK
Reported code forms P108664
CBR: Battery Electric Vehicle (BEV) DTC P108664 - Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure
VOLVO BUS
Reported code forms P1086
SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE EMS AND AFTERTREATMENT CONTROL MODULE (ACM) FOR THE VEHICLES AFFECTED BY THE BULLETIN. SOFTWARE UPDATES ARE TO RESOLVE THE FOLLOWING DIAGNOSTIC TROUBLE CODES…
VOLVO
Reported code forms P1086
VOLVO: THERE ARE ENHANCEMENTS TO SOFTWARE UPDATES FOR ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) TO RESOLVE DIAGNOSTIC TROUBLESHOOTING CODES P1086, P0420, P205B, P2002. MODEL 2013 VAH, VHD, VN.…
MACK
Reported code forms P1086
MACK: DIAGNOSTIC TROUBLE CODES (DTCS), P1086, P0420, P205B, P202, LOW TEMPERATURE, WILL BE RESOLVED WITH SOFTWARE UPDATE ENHANCEMENTS FOR ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM). MODEL 2013…
MACK
Reported code forms P1086
MACK: UPDATE SOFTWARE INFORMATION REGARDING ENHANCEMENTS FOR ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) ON VEHICLES WITH DIAGNOSTIC TROUBLE CODES (DTCS) P1086, P0420, P205B, P2002 AND LOW…
Check vehicle applicability
26A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mack | CHU | 2013 |
| Mack | GRANITE (GU) | 2013 |
| Mack | LEU | 2013 |
| Mack | LR ELECTRIC | 2025 |
| 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 |
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.