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P1131 Diagnostic Trouble Code Discussion for February 2007

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
2000 Mercury Mystique GS 2.5L Surge, Stall, MIL Lamp on VIN: 1FAFP66L6Y
P1131: o2 lean. can't here any vacuum leaks customer stated that this problem happened all of a sudden any help would be greatly appreciated also had a cougar that has same problem thanks mark
February 09, 2007
2001 Mercury Grand Marquis GS 4.6L Excessive Emissions, Poor Idle Quality, Cuts out, Stall VIN: 2MEFM74W71
P1131: lean b1. ... mercury grand marquis. The customer drove the car for two days with the mil on. on the second day he filled the tank with gas. On the third day he started the car did not run right it would fire up and then die. Start up and then die. We though it might be...
February 12, 2007