P0150
O2 Sensor Circuit Malfunction (Bank 2, Sensor 1)
Same condition as P0130 but on bank 2 of a multi-bank engine. Closed-loop fuel control on bank 2 is disabled while this fault is active.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Common causes
Ordered by how often each turns out to be the cause.
- Oxygen sensor agedCommon
- Sensor harness chafedPossible
Parts involved
- Oxygen Sensor Upstream
- Oxygen Sensor Wiring
P0150 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.