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P1131 Diagnostic Trouble Code Discussion for January 2005

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
1995 Ford Windstar GL 3.8L No Start VIN: 2FMDA5145S
P1131: front 02 sensor lean. The van takes a very long cranking time to start first thing in the morning, this problem has been going on for some time now and this is not the first try at solving the problem. In Nov,04 replaced MAF sensor and fuel filter and the problem seemed solved. Cus...
January 14, 2005
1999 Ford Contour SE 2.5L MIL Lamp on, humming VIN: 1FAFP66L8X
P1131: sensor idicating lean. When reving the engine it begins to hum like a pump running very loudly. It sounds like a loud commercial grade driveway vacuum cleaner. We have determined that the noise is coming from within the air cleaner. Removed the air cleaner cover and the noise is com...
January 18, 2005
1995 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBEA32E3S
P1131: oxygen sensor short to ground. Hey fellow techs, I've got one for all you Mercedes gurus. This vehicle came in with mil lamp on and four trouble codes. Three were oxygen sensor codes and one was coolant temp loose contact code. Wire harness is good in this vehicle and we replaced o2 sensor ...
January 26, 2005