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P2231 Diagnostic Trouble Code Discussion for October 2009

Heated Oxygen Sensor (Bank 1 Sensor 1) Signal Shorted To Heater Circuit

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Trouble Ticket Help Requests for DTC P2231
Help Request Posted
2004 Audi S4 4.2L MIL Lamp on VIN: WAUPL68E54
P2231: O2 sensor bank 1 sensor 1 Signal circuit shorted to heater circuit. Car came in for intermittent AC not blowing cold, while car was here MIL came on, we pulled these codes and then tested the sensors and both bank 1&2 sensors are working the same, we can not find a problem with bank 1 sensor but the codes return as soon as...
October 29, 2009