Powertrain, generic · Hybrid propulsion

P0BF2 Drive Motor B Phase U Current Sensor Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

GM runs P0BF2 as the offset test of the phase U current sensor in the motor B inverter. Each time the vehicle is started, while no current flows through the motor, the controller learns the sensor's zero point and compares it with a limit: 30 A on the 2011 Volt (Type A) and in the 2016 tables (Type A, after 0.1 s), 30 A on the 2012 and 2013 two-mode trucks (Type B, two trips, power stage open, P0BF3/P0BF4 not active) and 35 A in a 2019 table (Type A, after 0.4 s). Jeep lists P0BF2 on the 2020 Renegade and Compass 1.3 PHEV for Europe, together with the other motor A and B phase current codes, the turtle light and Service 4WD; the fix there is a software update of the hybrid control processors.

Likely causes

Hybrid control processor software (Jeep bulletin 08-056-21/08-057-21)
Zero point of the motor B phase U current sensor drifted past the limit
Faulty current sensing electronics in the power inverter module

Symptoms

  • Malfunction indicator lamp
  • Turtle (limp home) light and Service 4WD light (Jeep)
  • Reduced electric drive power

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time0.5–6 h

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

Parts involved

drive motor b phase u current sensorwiring harnesshybrid control module

Related codes

P0BF1P0BF3P0BF4P0BF6P0BFAP0BE6P0BFE

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.