P2270 OBD II Trouble Code O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2

How to quickly diagnose, repair, and info on symptoms and causes of a P2270 code that indicates a biased or stuck lean signal from the bank 1 second oxygen sensor.

Symptoms of P2270 OBD II Trouble Code

  • Exhaust leak near O2 sensor
  • Contaminated or failed HO2S2 (Sensor 2)
  • HO2S2 wiring/circuit problem
  • Loose installation of HO2S2
  • Fuel pressure incorrect
  • Faulty fuel injector
  • Engine coolant leak
  • Faulty purge solenoid valve
  • PCM has failed

Common Causes of P2270 OBD II Trouble Code

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  • 2006 MINI Cooper stuck @ 5000rpm P1613 P0054 P1786 P0136 P2270 P705just rebuild the starter (2002-2006) least 6 months standing i forget, i go to 45-55 mph and the rpm's get stuck going 90-10mph no difference 5000 rpm's, if i drive really slow it shifts good up to 45 or 51 mph, -automatic transmission- so far throwing codes ===P1613 P0054 P1786 P0136 P2270 ==p705?... 
  • 2012 Chevy Cruze : P015B, P0171, P2270My 2012 Cruze is throwing the following fault codes (no apparent performance issues) P015B O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 1 P0171 System too lean, bank 1 P2270 O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 Can someone give me a lead on what could be the issue? Thanks... 
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