P0BE2Drive Motor Inverter Temperature Sensor F Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0BE2 is set when the voltage from inverter temperature sensor F, the phase W thermistor in GM's motor B inverter, drops below the valid window. Because GM pairs an NTC element with a pull-up resistor, a short to ground is converted into a temperature far above anything the inverter can survive. Limits found in GM's tables: more than 170 °C for 2.5 of 3.5 s, Type B, two trips (2016 and 2018); more than 159 °C for 6.25 of 8.75 s, Type A (2019); more than 130 °C, Type A (2011 Volt); more than 125 °C, Type B (2012 and 2013 two-mode trucks). Genuine overheating of this phase has its own code, P0C16. The thermistor is part of the inverter, so it is rarely replaced on its own.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Power of drive motor B strongly limited
- Engine runs more often in hybrid operation
- Likely causes
- LikelyShorted thermistor or signal line inside the power inverter module
- PossibleSignal shorted to ground in external wiring, where the design has any
- RareMoisture or coolant inside the inverter housing
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.