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P0172 Diagnostic Trouble Code Discussion for October 2013

Fuel System Rich (Bank 1)


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Trouble Ticket Help Requests for DTC P0172
Help Request Posted
2000 Toyota 4Runner Limited 3.4L Misfire VIN: JT3HN87R3Y
P0172: Fuel System Too Rich (Bank 1). Attention Toyota Techs, mystery needs solving. This 4Runner came in with the complaint of a very intermittent misfire condition. The engine would be idling and suddenly run rough, when the customer steps on the gas she claims to hear a popping noise coming fr...
October 02, 2013
2001 Lincoln LS 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1LNHM87A01
P0172: System Rich bank 1. I'm getting a P0304, P0303, and P0300 stored in memory. The car runs rough at idle, Fuel Trims show bank 1 as -25% and bank 2 as +25%. I have replaced all spark plugs and #4 coil with no change. EGR Valve is functioning correctly with no leakage. No excessive ...
October 08, 2013
2005 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y65
P0172: Fuel Trim System Rich (Bank 1). ... have code P0172 which indicates throttle position sensor 1 circuit short/low. Testing verified that TPS is good but that we have no 5 volt reference coming out of computer pin#8 at connector 2 of pcm. This pin#8 only supplie...
October 14, 2013
2001 Ford Taurus SE 2-Valve 3.0L MIL Lamp on VIN: 1FAFP55U01
P0172: Rich bank 1. This is a returnless system i am trying to confirm where the fuel pressure is regulated dealer says part number [...] is the fuel pressure regulator but it looks more like a plastic rollover valve and a vapor valve that is inserted into the top of the tank wit...
October 24, 2013
2000 Toyota 4Runner Limited 3.4L Misfire VIN: JT3HN87R3Y
P0172: Fuel System Too Rich (Bank 1). Attention Toyota Techs, mystery needs solving. This 4Runner came in with the complaint of a very intermittent misfire condition. The engine would be idling and suddenly run rough, when the customer steps on the gas she claims to hear a popping noise coming fr...
October 02, 2013
2001 Lincoln LS 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1LNHM87A01
P0172: System Rich bank 1. I'm getting a P0304, P0303, and P0300 stored in memory. The car runs rough at idle, Fuel Trims show bank 1 as -25% and bank 2 as +25%. I have replaced all spark plugs and #4 coil with no change. EGR Valve is functioning correctly with no leakage. No excessive ...
October 08, 2013
2005 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y65
P0172: Fuel Trim System Rich (Bank 1). ... intermittent harsh shifting. We have code P0172 which indicates throttle position sensor 1 circuit short/low. Testing verified that TPS is good but that we have no 5 volt reference coming out of computer pin#8 at connector 2 of pcm. This pin#8 only supplie...
October 14, 2013
2001 Ford Taurus SE 2-Valve 3.0L MIL Lamp on VIN: 1FAFP55U01
P0172: Rich bank 1. This is a returnless system i am trying to confirm where the fuel pressure is regulated dealer says part number [...] is the fuel pressure regulator but it looks more like a plastic rollover valve and a vapor valve that is inserted into the top of the tank wit...
October 24, 2013