OBD-II code · Powertrain (generic)
P0E38 DC/DC Converter Voltage Sensor B Low
The ECM detects a low fault on the dc/dc converter voltage sensor b. Reading cannot be used reliably for control.
Is it safe to drive with P0E38?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Dcdc Voltage Sensor B, Wiring Harness, Dcdc Converter
Related codes
- P0E33DC/DC Converter Voltage Sensor A Low
- P0E35DC/DC Converter Voltage Sensor A Intermittent/Erratic
- P0E36DC/DC Converter Voltage Sensor B Circuit
- P0E37DC/DC Converter Voltage Sensor B Range/Performance
- P0E39DC/DC Converter Voltage Sensor B High
- P0E3ADC/DC Converter Voltage Sensor B Intermittent/Erratic
- P0E3BHybrid/EV Battery Coolant Pump Overspeed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.