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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| 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 |
