P2271
O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2
P2271 is an OBD-II diagnostic trouble code meaning: O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2. Common causes: oxygen sensor malfunction, exhaust gas leak in front of the sensor. Estimated repair cost: $28–89.
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine light comes on
- Reduced engine power
- Increased level of harmful emissions
Causes
- Oxygen sensor malfunction
- Exhaust gas leak in front of the sensor
- Problems with fuel injectors (overflow)
- EVAP system malfunction
- Damage to sensor wiring
How to Fix
- Check the condition of the oxygen sensor and its connector
- Check the exhaust system for leaks
- Diagnose the operation of fuel injectors
- Check EVAP system for leaks
- Replace the oxygen sensor if necessary
Related codes
Error P2271 by Vehicle Brand
FAQ
What does the P2271 code mean?
P2271 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2
What causes a P2271 error code?
The most common causes of P2271 include: Oxygen sensor malfunction; Exhaust gas leak in front of the sensor; Problems with fuel injectors (overflow); EVAP system malfunction.
How do I fix a P2271 diagnostic trouble code?
To fix P2271: Check the condition of the oxygen sensor and its connector. Check the exhaust system for leaks. Diagnose the operation of fuel injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2271?
Limited driving only, diagnose soon
How much does it cost to fix P2271?
The estimated repair cost for P2271 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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