OBD-II code guide
P0152 Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 means the upstream oxygen sensor voltage on bank 2 is higher than expected.
What it means
Bank 2 may be running rich, or the oxygen sensor signal may be stuck high.
Common symptoms
- Check engine light
- Poor fuel economy
- Black smoke
- Fuel smell
- Rough idle
Likely causes
- Rich mixture
- Leaking injector
- High fuel pressure
- Oxygen sensor fault
- Signal circuit short
First checks
- Review bank-specific fuel trims.
- Check for injector or fuel pressure issues.
- Inspect oxygen sensor wiring.
- Look for black smoke or fuel smell.