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P2270 Diagnostic Trouble Code Discussion for August 2011

Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Biased Lean

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Trouble Ticket Help Requests for DTC P2270
Help Request Posted
2004 Hyundai Elantra GLS 2.0L MIL Lamp on VIN: KMHDN46D74
P2270: Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Stuck Lean. car came in p2096 p2196 and p2270 upstream sensor reading about 2450mv -4000mv down stream reading about 800mv changing down to 0 and back up with the throttle We installed a walker 250-25012 upstream o2 sensor and the same results if we unplug the upstream s...
August 30, 2011