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P0131 Diagnostic Trouble Code Discussion for July 2007

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
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 06, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 07, 2007
1999 Chevrolet Express 2500 5.7L Hesitation VIN: 1GAGG25R8X
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Thanks to all fellow techs who review this and try to help me out. I have terrible luck with trying to diagnose these CSFI engines. Customer brought to our shop, it was a recent car lot purchase, with bad hesitation, back firing under slight load, checked fuel...
July 13, 2007
2000 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12K8Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Vehicle will start and run for 2+ seconds.. Shuts down by stopping injectors.. There is no 'theift' light present.. Oil level is correct.. Fuel pressure and fuel quality are correct.. 60 psi at prime and rests at 50 psi.. Remote locks and unlocks doors.. I am ...
July 13, 2007
1995 Buick Riviera 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4GD22K95
P0131: ho2s voltage high. Good afternoon to all, Riviera came in on hook for no start, I replaced the fuel pump and filter and It fired up and ran great. I checked codes because customer stated cel and traction light was coming on. Found PO131. I figured it was from the pump dying so I...
July 16, 2007
1998 Ford Econoline Super Duty Custom 6.8L MIL Lamp on, P0131, No Symptoms VIN: 1FDXE40S5W
P0131: Lack of HEGO switching lean limit HEGO 1-1. DTC P0131 (O2 1-1 lack of switching, lean limit) illuminated MIL with no symptoms present. Note very low mileage, immaculate and well maintained RV owned by a respected local collision shop owner. I was called in because I am very Ford knoweldgeable, and bree...
July 27, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 06, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 07, 2007
1999 Chevrolet Express 2500 5.7L Hesitation VIN: 1GAGG25R8X
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Thanks to all fellow techs who review this and try to help me out. I have terrible luck with trying to diagnose these CSFI engines. Customer brought to our shop, it was a recent car lot purchase, with bad hesitation, back firing under slight load, checked fuel...
July 13, 2007
2000 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12K8Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Vehicle will start and run for 2+ seconds.. Shuts down by stopping injectors.. There is no 'theift' light present.. Oil level is correct.. Fuel pressure and fuel quality are correct.. 60 psi at prime and rests at 50 psi.. Remote locks and unlocks doors.. I am ...
July 13, 2007
1995 Buick Riviera 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4GD22K95
P0131: ho2s voltage high. Good afternoon to all, Riviera came in on hook for no start, I replaced the fuel pump and filter and It fired up and ran great. I checked codes because customer stated cel and traction light was coming on. Found PO131. I figured it was from the pump dying so I...
July 16, 2007
1998 Ford Econoline Super Duty Custom 6.8L MIL Lamp on, P0131, No Symptoms VIN: 1FDXE40S5W
P0131: Lack of HEGO switching lean limit HEGO 1-1. DTC P0131 (O2 1-1 lack of switching, lean limit) illuminated MIL with no symptoms present. Note very low mileage, immaculate and well maintained RV owned by a respected local collision shop owner. I was called in because I am very Ford knoweldgeable, and bree...
July 27, 2007