P0BFA: Drive Motor B Phase W Current Sensor Circuit Range/Performance

P0BFA checks the phase W current sensor of the motor B inverter for a plausible zero point. GM learns the offset at each start while no current flows and sets the code above 30 A on the 2011 Volt (Type A, power stage open), above 30 A on the 2012 and 2013 two-mode trucks (Type B, two trips, only with P0BFB/P0BFC inactive), above 30 A after 0.1 s in the 2016 tables and above 35 A after 0.4 s in a 2019 table (both Type A). Jeep's EMEA bulletins for the 2020 Renegade and Compass 1.3 PHEV put P0BFA first among the motor B codes, with MIL, turtle and Service 4WD lights, and cure it with new software for the hybrid control processor and auxiliary processor (power inverter module).

Symptoms

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

Most likely causes

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

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Compare the reading with other engine data while varying the engine speed.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• It can trigger limp mode.
• It affects emissions.

What each character of P0BFA means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• B: Subsystem depends on the code range
• FA: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0BFA?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0BFA?

The most common causes are: hybrid control processor software (Jeep bulletin 08-056-21/08-057-21); zero point of the motor B phase W current sensor drifted past the limit; faulty current sensing electronics in the power inverter module.

Related codes

• P0BF9Drive Motor B Phase W Current Sensor Circuit
• P0BFBDrive Motor B Phase W Current Sensor Circuit Low
• P0BFCDrive Motor B Phase W Current Sensor Circuit High
• P0BF2Drive Motor B Phase U Current Sensor Circuit Range/Performance
• P0BF6Drive Motor B Phase V Current Sensor Circuit Range/Performance
• P0BEEDrive Motor A Phase W Current Sensor Circuit Range/Performance
• P0BFEDrive Motor B Phase U-V-W Current Sensor Correlation

Sources

• gsi.ext.gm.com: 19OBDG01 Hybrid Diagnostics
• gsi.ext.gm.com: 16OBDG02 Hybrid Diagnostics
• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
• gsi.ext.gm.com: 13OBDG06 Hybrid Diagnostics

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.