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P1131 Diagnostic Trouble Code Discussion for November 2004

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
1997 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMDU35P2V
P1131: HO2S11 sensor indicates lean. Hello,have a vehicle that the mil has been on for a year. Tk started to run poorly and customer brought it in. I found numerous O2 codes and tk would enter closed loop with all O2's reading less than .1v. Checked all wires at O2 2/1. found good ground on sig r...
November 02, 2004
1997 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Surge VIN: 1FMDU34EXV
P1131: lean bank 1. ... complaint of poor/surging idle and delay in shifting from 1st to 2nd. technician confirmed both complaints. scanned for codes. no codes in obd ii generic mode and no readings from o2 sensors. no communication with scanner in oem obd ii mode. replaced ecm. ...
November 17, 2004
1998 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMZA5144W
P1131: lack of ho2s b1s1 indicates lean. thanks to all in advance, this windstar once in a while will set the above mentioned codes with no drivabillity issues, so the first time it came in we scaned and did a visual under the hood, we found the pcv hose in bad shape and leaking, so that was fixed an...
November 18, 2004
2000 Audi S4 2.7L MIL Lamp on VIN: WAUDD68D2Y
P1131: bank2 probe1 internal resistance too great. I have run the actuaters test,o2 sensers test,and put the smoke machine on intake to find vacuum leaks.do not currently hear any exhaust leaks.unable to find actuall test for the codes that i have.have two scanners with factory vag capability-modis and the lau...
November 23, 2004
1997 Ford F-250 Lariat 5.4L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 1FTEX27L2V
P1131: ho2s11 lean. This truck has been wrecked and is pretty rough. The first question I have is when I look at module ID on snap on scanner, I get SOFTWARE FILE: ALAPKE3.HEX MODULE PART# F7PFAEA VIN; NOT AVAILABLE, wouldnt it be a problem for this pcm to not have the vin# flash...
November 30, 2004