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P0172 Diagnostic Trouble Code Discussion for February 2015

Fuel System Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2010 Chevrolet Malibu LT 2.4L Flooded on starting VIN: 1G1ZC5EB9A
P0172: Rich Bank One. Customer complaint, every morning, hard to start, need to hold throttle open to start, flooded, cloud of black smoke from tail pipe. Once that clears, runs great, no drive ability problem. Once it stands for 4 or 5 hours, same issue. Long Term Fuel Trim -20 Re...
February 04, 2015
2010 Chevrolet Malibu LT 2.4L Excessive Emissions, MIL Lamp on, hard start when cold VIN: 1G1ZC5E02A
P0172: rich bank 1. Customer complaint of hard starting when cold and cel light is on.Code po172 rich bank 1 was found.Once started,vehicle runs fine and doesnt seem to have a fuel consumption issue. On examination I did notice that the temp never rose above 145 deg and after si...
February 08, 2015
2004 Audi A4 1.8L MIL Lamp on VIN: WAUJC68E94
P0172: Bank 1 system too rich. Customer states mil light is on and runs sluggish Found MAF plug harness has no ignition 12v power and is shorted to ground all the time. When key on, it has 5v ref power from ecm and ground from ecm. All fuses are good. Without 12v power MAF will not work rig...
February 17, 2015