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P0131 Diagnostic Trouble Code Discussion for October 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
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NG52E33
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Some other data stream info. Injector plus 7.84 during cranking MAF 0.00 g/s unpluged, 4.37 g/s cranking, KOEO any where from 68.61-241 g/s (is that normal?) So car is towed in as no start and customer states it is a fuel pump. We check fuel pressure and it...
October 15, 2008
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NG52E33
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Some other data stream info. Injector plus 7.84 during cranking MAF 0.00 g/s unpluged, 4.37 g/s cranking, KOEO any where from 68.61-241 g/s (is that normal?) So car is towed in as no start and customer states it is a fuel pump. We check fuel pressure and it...
October 16, 2008
2000 Nissan Xterra SE 3.3L MIL Lamp on VIN: 5N1ED28Y8Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift). reoccuring code p0131. long term and short term fuel trim within 4%. maf was cleaned and reads 4.1 grams at idle and over 14gms at 2500rpm unloaded, which identifix says is within spec. the data stored when the code sets says the vehicle is at highway speed wh...
October 17, 2008
2003 Mazda MPV EX 3.0L Poor Idle Quality, Surge VIN: JM3LW28J73
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input (No Inversion). car surges and bucks at idle. fuel pressure is low[51#s spec by aldata is61 to 66]with new puel pump. dead head pressure is 70#s+ with fuel line disconnected at rail. running voltage is 14.1 and voltage at relay is also 14.1. fuel trims are slightly lean and o...
October 30, 2008
2002 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W12
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. ... shop with an engine misfire & trouble codes P0101, P0125 & P0300. Customer stated he had just changed the spark plugs before bringing it in. We checked misfire counts and found cyls. 1 & 3 were high. Found bad plug wires so we completed the tun...
October 31, 2008
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NG52E33
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Some other data stream info. Injector plus 7.84 during cranking MAF 0.00 g/s unpluged, 4.37 g/s cranking, KOEO any where from 68.61-241 g/s (is that normal?) So car is towed in as no start and customer states it is a fuel pump. We check fuel pressure and it...
October 15, 2008
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NG52E33
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Some other data stream info. Injector plus 7.84 during cranking MAF 0.00 g/s unpluged, 4.37 g/s cranking, KOEO any where from 68.61-241 g/s (is that normal?) So car is towed in as no start and customer states it is a fuel pump. We check fuel pressure and it...
October 16, 2008
2000 Nissan Xterra SE 3.3L MIL Lamp on VIN: 5N1ED28Y8Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift). reoccuring code p0131. long term and short term fuel trim within 4%. maf was cleaned and reads 4.1 grams at idle and over 14gms at 2500rpm unloaded, which identifix says is within spec. the data stored when the code sets says the vehicle is at highway speed wh...
October 17, 2008
2003 Mazda MPV EX 3.0L Poor Idle Quality, Surge VIN: JM3LW28J73
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Input (No Inversion). car surges and bucks at idle. fuel pressure is low[51#s spec by aldata is61 to 66]with new puel pump. dead head pressure is 70#s+ with fuel line disconnected at rail. running voltage is 14.1 and voltage at relay is also 14.1. fuel trims are slightly lean and o...
October 30, 2008
2002 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W12
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. ... shop with an engine misfire & trouble codes P0101, P0125 & P0300. Customer stated he had just changed the spark plugs before bringing it in. We checked misfire counts and found cyls. 1 & 3 were high. Found bad plug wires so we completed the tun...
October 31, 2008