Powertrain, generic · Hybrid propulsion

P0BFD Drive Motor A Phase U-V-W Current Sensor Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

In a three-phase motor without a neutral connection the three phase currents must add up to roughly zero. P0BFD checks this for drive motor A: if the absolute sum of the U, V and W readings exceeds a limit, at least one sensor is wrong. GM's limits: 156 A on the 2011 Volt and 110 A on the 2012 and 2013 two-mode trucks (Type A, one trip), 110 A for 0.0032 of 0.0038 s in the 2016 and 2019 tables (Type A). GM's BAS Plus (eAssist) uses another balance, motor DC current plus accessory module current versus battery current, above 40 A, Type B, blocked while a phase sensor code is active. Jeep lists P0BFD on the 2020 Renegade and Compass 1.3 PHEV (EMEA), fixed by a software update.

Likely causes

Hybrid control processor software (Jeep bulletin 08-056-21/08-057-21)
One motor A phase current sensor reading wrong but still within its own limits
Faulty current sensing electronics in the power inverter module

Symptoms

  • Malfunction indicator lamp and hybrid warning
  • Turtle (limp home) light and Service 4WD light (Jeep)
  • Reduced power from drive motor A

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 a phase u current sensordrive motor a phase v current sensordrive motor a phase w current sensor

Related codes

P0BFEP0BE6P0BEAP0BEEP0BE7P0BEFP0C01P0C05

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