Join Now
International Automotive Technicians Network

P0131 Diagnostic Trouble Code Discussion for October 2004

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


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

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
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