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.
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.
Scan worksheet →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 Failure
P108664Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure
Manufacturer communications
8Original wording in English
VOLVO
CBR: Battery Electric Vehicle (BEV) DTC P108664 - Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure.
MACK
CBR: Battery Electric Vehicle (BEV) DTC P108664 - Charging Switch Unit B, Voltage Supply, Signal Plausibility Failure
VOLVO BUS
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 (DTC). • DTC P1086, OIL LEVEL MODERATELY LOW, LOW OIL LEVEL LIGHT COMING ON DURING START UP • DTC P0420, NOX CATALY…
VOLVO
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. *PE UPDATED 2/28/2014 *JS
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 |
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.