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P1131 Diagnostic Trouble Code Discussion for April 2009

Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean


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Trouble Ticket Help Requests for DTC P1131
Help Request Posted
1998 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGF22D1W
P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... service code keeps coming back.before asking for assistance from this great group,i made sure i didnt have any intake leaks or hoses cracked.no leaks found with smoke machine.so,i figured the upstream sensors must just be lazy after 140,000 miles.installed...
April 03, 2009
1998 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGF22D1W
P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... service code keeps coming back.before asking for assistance from this great group,i made sure i didnt have any intake leaks or hoses cracked.no leaks found with smoke machine.so,i figured the upstream sensors must just be lazy after 140,000 miles.installed...
April 03, 2009