P0BBD Possible Causes
- Faulty drive motor battery assembly
- Faulty drive motor generator battery
- Faulty drive motor generator battery control module
- Drive motor battery assembly harness is open or shorted
- Poor electrical connection in drive motor battery assembly circuit
What Does It Mean?
How to Fix Code P0BBD
Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0BBD Possible Symptoms
Engine light on (or service engine soon warning light)
P0BBD Meaning
The drive motor generator battery control module is also called the battery energy control module (BECM). The BECM will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status are communicated from the BECM to the hybrid powertrain control module (HPCM) via the hybrid LAN communication circuit. The HPCM is the host controller for diagnostic trouble code (DTC) information.
The hybrid battery assembly consists of 40 individual batteries. Each battery is rated at 7.2 volts. A pair of batteries is rated at 14.4 volts. The batteries are connected together in a series circuit. The BECM monitors the hybrid battery voltage across two batteries for a total of 20 locations throughout the battery assembly. The BECM monitors and compares these 20 voltage measurements; if the BECM detects a voltage difference greater than a calibrated value across two consecutive hybrid battery voltage measurements, this DTC will set.