Powertrain, generic (extended)

P2BE2 Hybrid/EV Battery Coolant Level Sensor Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2BE2 is stored when the voltage from the battery coolant level sensor falls below the lowest value the sensor can legitimately produce. That points to the signal touching ground or a sensor whose output collapses, not to a low coolant level, which normally reads inside the valid range. No manufacturer documents P2BE2 publicly. On the Chevrolet Volt GM uses its own code P1FFC for this case: below 1.37 V with the 12 V system above 10.2 V, 40 of 50 samples at 100 ms, Type A and MIL on the first trip. CARB requires out-of-range checks for such inputs. Because the controller no longer knows the level, it may restrict charging or hybrid operation. Open and high faults are P2BE0 and P2BE3.

Likely causes

Signal wire chafed through and shorted to ground
Level sensor output stuck low
Sensor supply missing (connector, corrosion)

Symptoms

  • Hybrid system warning
  • MIL on
  • Charging possibly disabled

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–350
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery coolant level sensorwiring harnessbms

Related codes

P2BE3P2BE0P2BE1

References: gsi.ext.gm.com, law.cornell.edu, static.nhtsa.gov.