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P1131 Diagnostic Trouble Code Discussion for December 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
1996 Ford F-350 XLT 7.5L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FTJW36G4T
P1131: ho2s11 lean. I know the egr valve and tube is bad, however I have blocked off egr to see if a difference is made. It only seemed to change the rich reading from bank 2 to bank 1. After it runs for a while this will flip flop from one to the other and the long term adaptive...
December 08, 2009
1996 Ford F-350 XLT 7.5L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FTJW36G4T
P1131: ho2s11 lean. I know the egr valve and tube is bad, however I have blocked off egr to see if a difference is made. It only seemed to change the rich reading from bank 2 to bank 1. After it runs for a while this will flip flop from one to the other and the long term adaptive...
December 09, 2009
1996 Ford F-350 XLT 7.5L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FTJW36G4T
P1131: ho2s11 lean. I know the egr valve and tube is bad, however I have blocked off egr to see if a difference is made. It only seemed to change the rich reading from bank 2 to bank 1. After it runs for a while this will flip flop from one to the other and the long term adaptive...
December 08, 2009
1996 Ford F-350 XLT 7.5L Poor Idle Quality, Surge, MIL Lamp on VIN: 1FTJW36G4T
P1131: ho2s11 lean. I know the egr valve and tube is bad, however I have blocked off egr to see if a difference is made. It only seemed to change the rich reading from bank 2 to bank 1. After it runs for a while this will flip flop from one to the other and the long term adaptive...
December 09, 2009