P2BE1Hybrid/EV Battery Coolant Level Sensor Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2BE1 reports a battery coolant level signal that lies inside the electrical limits yet makes no sense, such as a value between the defined full and low states or one that flickers while the vehicle stands still. No manufacturer documents this code publicly. GM shows how such a check works on the Chevrolet Volt: its code P1FFB fails when the sensor voltage sits in a forbidden band of 2.85 to 3.11 V, 40 of 50 samples at 100 ms, Type A, while a genuine low level (1.38 to 2.84 V, judged only at standstill) has its own code. GM bulletin PI0961 adds cracked solder joints inside the sensor as a source of intermittent readings. CARB requires rationality checks for hybrid inputs. The pure circuit faults are P2BE0, P2BE2 and P2BE3.
- What you may notice
- Hybrid system warning, often intermittent
- MIL on
- Coolant level looks correct at the reservoir
- Likely causes
- LikelyLevel sensor with internal fault, e.g. cracked solder joints
- PossibleIntermittent contact in connector or jumper harness
- PossibleCoolant level near the switching point or air in the loop
- RareEvaluation software in the battery or hybrid controller
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €30 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.