What it means
The hybrid control module detects a circuit range/performance fault on the high-voltage battery pack current sensor C. Pack-level current measurement is impaired.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Battery pack current sensor C measures current flowing into or out of the high-voltage pack for the hybrid control module. P2BE5 sets when sensor C's output is electrically plausible but falls outside the expected range or does not track pack operation correctly.
Common causes
Most likely first.
- Current sensor C signal offset
- Wiring or connector fault
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
How to diagnose it
- Save freeze-frame data and compare sensor C live data during charging and load changes with other pack current information.
- Inspect sensor C's accessible connector and harness for loose pins, corrosion, damage, or routing that could cause intermittent readings.
- Check wiring continuity and connections in the sensor C circuit using the manufacturer's diagram.
- Look for a consistent offset or erratic sensor C reading compared with pack operation and the manufacturer's specification.
- If the circuit is sound, test current sensor C for signal offset or poor response using the manufacturer's procedure.
Common fixes
- Reseat the sensor C connector and repair any poor terminal contact.
- Repair damaged wiring or grounding affecting the sensor C signal.
- Replace current sensor C if its signal remains offset or out of range after circuit checks.
- Verify that sensor C data tracks pack current after the repair.
Can I keep driving?
Power delivery, regenerative operation, or charging may be restricted while sensor C data is unreliable. Avoid heavy loads and long trips if the vehicle has reduced-power warnings, and have the fault diagnosed soon.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.