P0152
O2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
Same condition as P0132 but on bank 2. The upstream sensor reports a continuously rich condition or has a short to supply voltage.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
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.
- Bank 2 running rich (leaking injector, high fuel pressure)Common
- Signal wire shorted to supply voltagePossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Oxygen Sensor Upstream
- Fuel Injector
P0152 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.