P0B11 Possible Causes
- Faulty battery energy control module
- Battery energy control module harness is open or shorted
- Poor electrical connection in battery energy control module circuit
What Does It Mean?
How to Fix Code P0B11
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.
P0B11 Possible Symptoms
Check engine light on (or service engine soon warning light)
P0B11 Meaning
The hybrid/EV battery current sensor is mounted inside the hybrid/EV battery. The positive high voltage cable going to the positive contactor relay passes through the hybrid/EV battery pack current sensor. The hybrid/EV battery current sensor detects the amperage flowing into and out of the hybrid/EV batteries. The battery energy control module provides and monitors a 5V reference signal to the hybrid/EV battery pack current sensor. The hybrid/EV battery current sensor returns a signal between 0 and 5V to the battery energy control module. The hybrid/EV battery current sensor signal is proportional to the amperage flowing into and out of the hybrid/EV battery. A hybrid/EV battery current sensor signal voltage higher than 2.5V indicates the hybrid/EV battery is charging, and a signal voltage lower than 2.5V indicates discharging. The hybrid/EV battery current sensor has 2 measurement ranges to maintain accuracy. The ranges are low resolution and high resolution. The hybrid/EV battery pack current sensor measurement ranges overlap. The high resolution measures from -23 to +23 A. The low resolution measures from -470 to +280 A.