P00D3
HO2S Heater Control Circuit Range/Performance Bank 2 Sensor 1
Heater control of bank 2 sensor 1 is electrically OK but does not heat the sensor as expected — element aged or wiring resistance high.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Heater element agedCommon
- Sensor element aged beyond calibration windowLess likely
- Sensor mounting loose - signal dampingLess likely
Parts involved
- Oxygen Sensor B2s1
P00D3 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.