OBD-II code · Powertrain (generic)
P055E Oxygen Sensor Control Module System Voltage
The dedicated O2 sensor control module - found on systems with a wide-band sensor needing its own pumping current driver - reports its supply voltage outside the calibrated window.
Is it safe to drive with P055E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply voltage low or unstable
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Likely to fail
- Parts involved
- Oxygen Sensor Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.