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P1151 Diagnostic Trouble Code Discussion for July 2009

Electronic Throttle System Sub Accelerator Position Sensor 2 Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1151
Help Request Posted
1997 Mercury Mountaineer 5.0L Excessive Emissions VIN: 4M2DU55P4V
P1151: os/s b2s1 lean. Vehicle came in for failed emission test (IM240 Colorado). Fuel control looks good most of the time yet occasionally the front o2 sensor signals go to zero volts (both left and right sensors at the same time.) There seams to be a trend of doing this under a he...
July 16, 2009
1997 Lincoln Continental Spinmaker Edition 4.6L MIL Lamp on VIN: 1LNLM97V9V
P1151: o2 sensor b2 s1 switch point indicates lean. This car will set the p1151 (02S switch point lean) after a short drive all the time. The fuel trim data shows +15 to +20 numbers on light load (cruise). We replaced the o2 because it was old and needed replacement. The MAF was replaced because the baro pid re...
July 20, 2009
1997 Lincoln Continental Spinmaker Edition 4.6L MIL Lamp on VIN: 1LNLM97V9V
P1151: o2 sensor b2 s1 switch point indicates lean. This car will set the p1151 (02S switch point lean) after a short drive all the time. The fuel trim data shows +15 to +20 numbers on light load (cruise). We replaced the o2 because it was old and needed replacement. The MAF was replaced because the baro pid re...
July 21, 2009
1997 Mercury Mountaineer 5.0L Excessive Emissions VIN: 4M2DU55P4V
P1151: os/s b2s1 lean. Vehicle came in for failed emission test (IM240 Colorado). Fuel control looks good most of the time yet occasionally the front o2 sensor signals go to zero volts (both left and right sensors at the same time.) There seams to be a trend of doing this under a he...
July 16, 2009
1997 Lincoln Continental Spinmaker Edition 4.6L MIL Lamp on VIN: 1LNLM97V9V
P1151: o2 sensor b2 s1 switch point indicates lean. This car will set the p1151 (02S switch point lean) after a short drive all the time. The fuel trim data shows +15 to +20 numbers on light load (cruise). We replaced the o2 because it was old and needed replacement. The MAF was replaced because the baro pid re...
July 20, 2009
1997 Lincoln Continental Spinmaker Edition 4.6L MIL Lamp on VIN: 1LNLM97V9V
P1151: o2 sensor b2 s1 switch point indicates lean. This car will set the p1151 (02S switch point lean) after a short drive all the time. The fuel trim data shows +15 to +20 numbers on light load (cruise). We replaced the o2 because it was old and needed replacement. The MAF was replaced because the baro pid re...
July 21, 2009