P0B76Hybrid/EV Battery Voltage Sense L Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B76 closes the channel L group and covers an erratic signal: values that jump or vanish briefly while the circuit otherwise works. No manufacturer documents this code publicly; GM, the only maker with public tables for L, defines open, plausibility, low and high tests for this channel but no erratic test, and the Ford bulletins name only the open-circuit code P0B72. CARB obliges manufacturers to monitor the battery voltage sensors of a hybrid energy storage system, which is the regulatory background of the code. Practically, an intermittent contact at the channel L tap, a fatigued harness or a cracked board joint would produce this picture. Warnings may disappear after a restart and return.
- What you may notice
- Warning clears after restart and comes back
- Momentary power reduction
- Likely causes
- LikelyIntermittent contact at the channel L cell tap
- PossibleFatigued sense harness wire
- RareCracked solder joint on the monitoring board
- 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: €80 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.