OBD-II code · Powertrain (generic)
P0E9B DC/DC Converter Voltage Sensor C Circuit Low
The ECM detects a low fault on the dc/dc converter voltage sensor c circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0E9B?
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
- Less likelyConnector pins corroded - high contact resistance
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 C, Wiring Harness, Dcdc Converter
Related codes
- P0E98Drive Motor B Inverter Voltage Sensor B Circuit Intermittent/Erratic
- P0E99DC/DC Converter Voltage Sensor C Circuit
- P0E9ADC/DC Converter Voltage Sensor C Circuit Range/Performance
- P0E9CDC/DC Converter Voltage Sensor C Circuit High
- P0E9DDC/DC Converter Voltage Sensor C Circuit Intermittent/Erratic
- P0E9EDC/DC Converter Current Sensor B Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.