P2271 Diagnostic Trouble Code Discussion for December 2025
Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Biased Rich
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| Help Request | Posted | |
| 2005 Ford Ranger Edge 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FTZR45EX5 P2271: Bank 1 sensor 2 stuck rich. Vehicle came in with multiple oxygen sensor codes, misfire codes and bank 2 too rich and too lean. Watched fuel trims and bank 2 Long term was 25 short term would fluctuate between 40 and 68. Pulled spark plugs and they were very black on bank 2. Replaced ... |
December 15, 2025 |
