P0B6AHybrid/EV Battery Voltage Sense J Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- A reading of almost zero on channel J points to the measurement, not to the cell, and that is what P0B6A records. In GM's lithium-ion systems (2016 and 2019 tables) the battery energy control module sets it at 0.2 V or less for 1.4 s within 2 s, Type A. The interesting part is what it ignores: while a module communication loss, an open sense line code, a balancing fault or an internal module fault is active, P0B6A stays silent so that the root cause is stored first. The 2012 two-mode hybrids look at nickel-metal hydride block 10 together with block 11, both below 2 V in 15 of 20 samples, Type B. Expect reduced or no electric drive until the circuit is repaired.
- What you may notice
- Electric drive limited or unavailable
- MIL and battery warning message
- Likely causes
- LikelyChannel J lead chafed through and shorted to ground
- PossibleDamaged measuring input on the monitoring board
- RareCell on channel J internally shorted
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.