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P1131 Diagnostic Trouble Code Discussion for August 2004

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
1997 Ford Thunderbird LX 3.8L Surge, MIL Lamp on VIN: 1FALP6242V
P1131: b1s1 no switch lean. On this 3.8 i have what appears to be 4 dead o2s. on the mastertech i show 0 volts across the board. loop status is "ol fault" all fuel trims are 0. scoped all o2s and they are actually pulling lean. when a shot of propane is introduced they respond. b...
August 09, 2004
1998 Mazda 626 DX 2.0L MIL Lamp on VIN: 1YVGF22C7W
P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... directed to any ford mazda techs. We have a mazda 626 lx with a code p1131. Replaced the 02s11 and retested after a long test drive and the same code sets. I found a ford bulletin #013/99R. I tested voltage at front 02 and monitered pid voltage per this bu...
August 31, 2004
1997 Ford Thunderbird LX 3.8L Surge, MIL Lamp on VIN: 1FALP6242V
P1131: b1s1 no switch lean. On this 3.8 i have what appears to be 4 dead o2s. on the mastertech i show 0 volts across the board. loop status is "ol fault" all fuel trims are 0. scoped all o2s and they are actually pulling lean. when a shot of propane is introduced they respond. b...
August 09, 2004
1998 Mazda 626 DX 2.0L MIL Lamp on VIN: 1YVGF22C7W
P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... directed to any ford mazda techs. We have a mazda 626 lx with a code p1131. Replaced the 02s11 and retested after a long test drive and the same code sets. I found a ford bulletin #013/99R. I tested voltage at front 02 and monitered pid voltage per this bu...
August 31, 2004