Powertrain
generic / SAE
P0165
O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)
The ECU detects abnormally high voltage from the third O2 sensor on bank 2. Indicates rich exhaust or wiring shorted to voltage.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 65
Possible causes
- Rich exhaust condition high
- Signal wire shorted to voltage medium
- Connector pins corroded - high contact resistance low
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 b2s3
- Component: oxygen sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012