P2253: O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
Standardized SAE J2012 code · P22xx — Fuel & air metering and auxiliary emission controls
What does P2253 mean?
The Vs negative line on bank 1, sensor 1 reads above the upper threshold. Often a short to positive or a damaged ECU sensor amplifier.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Common causes
- High Vs negative line shorted to positive
- Medium Internal short in sensor
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2253 on the same make and model first.
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