Powertrain
generic / SAE
P0153
O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
The ECU detects an abnormally high voltage from the upstream O2 sensor on bank 2. Indicates persistently rich exhaust, shorted sensor or wiring shorted to voltage.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 53
Possible causes
- Bank 2 running rich (leaking injector, high fuel pressure) high
- Signal wire shorted to voltage medium
- Upstream O2 sensor failed medium
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.3–1.5 h
- Component: oxygen sensor b2s1
- Component: oxygen sensor wiring
- Component: fuel injector bank2
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012