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P0131 Diagnostic Trouble Code Discussion for October 2004

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0131
Help Request Posted
1996 Saab 900 SE 2.5L MIL Lamp on VIN: YS3DF78V9T
P0131: O2 circuit low voltage B1S1. Need help with this car. Keeps setting O2 sensor codes. If the codes are cleared they will return after driving the car. Don't have a SAAB scan tool so can only look at OBD II data. The data shows 0 volts for all the O2 sensors and does not change. LOOP status...
October 04, 2004