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P0131 Diagnostic Trouble Code Discussion for March 2008

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0131
Help Request Posted
2000 Oldsmobile Silhouette GL 3.4L Surge VIN: 1GHDX13F3X
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input. Help, GM techs! This vehicle is owned by a very good customer of ours. The 2 complaints, are Check Engine Light coming on (numerous times last year - most not documented) and jerking while driving down the road after a hot run, such as interstate driving then ...
March 07, 2008
1998 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2GCEC19R8W
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Ok another head scratcher at least for me. Customer came in complaining of a stumble but no codes and the truck sat for about a week. When i first looked at it it had no codes and seem to run fine, no stumble or missfire. (Keep in mind the motor was still cold...
March 25, 2008
1999 Chevrolet Express 2500 5.7L Excessive Emissions, Hesitation, Cuts out, Poor Fuel Economy VIN: 1GCGG25R8X
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. at idle this van runs great. engine will rev just fine on light excell, but med. to heavy excell it will not rev over 1200-1500 rpm. backfires through intake. falls flat on its face. fuel pressure in spec.koeo and 55psi when acting up. cam retard at 0- +1 degr...
March 25, 2008