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P0171 Diagnostic Trouble Code Discussion for September 2004

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2F4CR12ADV
P0171: system lean. yes i know the vin is wrong sorry but i am at home and dont have it ok here goes i am wondering what i have is when i give it some gas and the rpm rises i hear a vacuum leak it sounds like in the upper intake but i can not find one all i can do is hear one i t...
September 08, 2004
2000 Toyota Tacoma DLX 3.4L MIL Lamp on VIN: 5TEWN72N4Y
P0171: Fuel System Too Lean (Bank 1). ... Code P0171 lean exhaust. I checked the items listed above and they all test good. Cleared the code. Drove the vehicle around for a few days and the mil did not come back on. The owner took the vehicle and drove it for two weeks and the mil came on again. S...
September 12, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5245X
P0171: 02 lean bank 1. Here's the deal, this van is suffering from the infamous lean codes everybody is talking about. Valve cover has been updated, no oil is present in intake housing, detectable vacuum leak around imrc shaft. Engine will misfire if fuel is sprayed around shafts by...
September 13, 2004
1996 Dodge B1500 5.2L Excessive Emissions, MIL Lamp on VIN: 2B4HB15Y7K
P0171: Fuel System Lean (Bank 1). ... please? It has a p0171 code. Check fuel pressure, check for internal vacuum leaks like the intake problems that i read in the fix data base. Key on engine off the o2 reads 4.82 volts. Is this a feed back from a referance feed of 5.0 volts? With the engine ...
September 17, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5245X
P0171: 02 lean bank 1. Here's the deal, this van is suffering from the infamous lean codes everybody is talking about. Valve cover has been updated, no oil is present in intake housing, detectable vacuum leak around imrc shaft. Engine will misfire if fuel is sprayed around shafts by...
September 17, 2004
2001 Ford Ranger XL 3.0L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTZR15UO1
P0171: System too lean-Bank 1. Customer is a neighbor of mine. Engine has mis at all times. It is definitley cyl 1. Replaced plugs,wires and coil at customer request, no help. Scan tool showed HO2s B1S2 switching slow. Replaced sensor (looked to be generic) with Motorcraft, no luck. Now sca...
September 20, 2004
2000 Toyota Avalon XL 3.0L MIL Lamp on VIN: 4T1BF28B2Y
P0171: Fuel System Too Lean (Bank 1). Code p0171 is reoccuring after clearing. No performance issues. have performed a/f sensor test and checked for vacuum leaks. I suspect that a/f sensor is faulty but cannot prove it since light only seems to occur when customer is driving vehicle.
September 21, 2004
1998 Ford Contour GL 2.0L MIL Lamp on VIN: 1FALP6530W
P0171: lean condition bank 1. Hello iatn members 1998 contour has check engine light on Code 171 lean condition. I did not find any vacuum leaks, and fuel pressure (33-35 p.s.i) within spec. As I looked at the data on the scanner the 02 sensors were switching from lean to rich but the Lt f...
September 23, 2004
1995 Lincoln Continental Diamond Anniversary 4.6L MIL Lamp on VIN: 1LNLM97V4S
P0171: bank 1 lean. ... last 6 months with the mil on and codes P0171 & P0714. Finally they just kept clearing the codes. Now I got it. I have done all the basic test and are OK. Fuel pressure is with in range, no vac. leaks, checked it with carb cleaner while observing the H...
September 28, 2004
2000 Toyota Echo 1.5L Misfire, MIL Lamp on VIN: JTDBT1235Y
P0171: Fuel System Too Lean (Bank 1). Car sets codes P0300 random misfire and P0171 lean mixture. Replaced all four spark plugs, and checked ign. coils and boots. All coils and boots looked OK. The O2 voltage drops to 0.00 at idle, but when you rev. the engine up the O2 sensor voltage moves up and...
September 28, 2004
1995 Lincoln Continental Diamond Anniversary 4.6L MIL Lamp on VIN: 1LNLM97V4S
P0171: bank 1 lean. ... last 6 months with the mil on and codes P0171 & P0714. Finally they just kept clearing the codes. Now I got it. I have done all the basic test and are OK. Fuel pressure is with in range, no vac. leaks, checked it with carb cleaner while observing the H...
September 30, 2004
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2F4CR12ADV
P0171: system lean. yes i know the vin is wrong sorry but i am at home and dont have it ok here goes i am wondering what i have is when i give it some gas and the rpm rises i hear a vacuum leak it sounds like in the upper intake but i can not find one all i can do is hear one i t...
September 08, 2004
2000 Toyota Tacoma DLX 3.4L MIL Lamp on VIN: 5TEWN72N4Y
P0171: Fuel System Too Lean (Bank 1). ... Code P0171 lean exhaust. I checked the items listed above and they all test good. Cleared the code. Drove the vehicle around for a few days and the mil did not come back on. The owner took the vehicle and drove it for two weeks and the mil came on again. S...
September 12, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5245X
P0171: 02 lean bank 1. Here's the deal, this van is suffering from the infamous lean codes everybody is talking about. Valve cover has been updated, no oil is present in intake housing, detectable vacuum leak around imrc shaft. Engine will misfire if fuel is sprayed around shafts by...
September 13, 2004
1996 Dodge B1500 5.2L Excessive Emissions, MIL Lamp on VIN: 2B4HB15Y7K
P0171: Fuel System Lean (Bank 1). ... please? It has a p0171 code. Check fuel pressure, check for internal vacuum leaks like the intake problems that i read in the fix data base. Key on engine off the o2 reads 4.82 volts. Is this a feed back from a referance feed of 5.0 volts? With the engine ...
September 17, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMZA5245X
P0171: 02 lean bank 1. Here's the deal, this van is suffering from the infamous lean codes everybody is talking about. Valve cover has been updated, no oil is present in intake housing, detectable vacuum leak around imrc shaft. Engine will misfire if fuel is sprayed around shafts by...
September 17, 2004
2001 Ford Ranger XL 3.0L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTZR15UO1
P0171: System too lean-Bank 1. Customer is a neighbor of mine. Engine has mis at all times. It is definitley cyl 1. Replaced plugs,wires and coil at customer request, no help. Scan tool showed HO2s B1S2 switching slow. Replaced sensor (looked to be generic) with Motorcraft, no luck. Now sca...
September 20, 2004
2000 Toyota Avalon XL 3.0L MIL Lamp on VIN: 4T1BF28B2Y
P0171: Fuel System Too Lean (Bank 1). Code p0171 is reoccuring after clearing. No performance issues. have performed a/f sensor test and checked for vacuum leaks. I suspect that a/f sensor is faulty but cannot prove it since light only seems to occur when customer is driving vehicle.
September 21, 2004
1998 Ford Contour GL 2.0L MIL Lamp on VIN: 1FALP6530W
P0171: lean condition bank 1. Hello iatn members 1998 contour has check engine light on Code 171 lean condition. I did not find any vacuum leaks, and fuel pressure (33-35 p.s.i) within spec. As I looked at the data on the scanner the 02 sensors were switching from lean to rich but the Lt f...
September 23, 2004
1995 Lincoln Continental Diamond Anniversary 4.6L MIL Lamp on VIN: 1LNLM97V4S
P0171: bank 1 lean. ... last 6 months with the mil on and codes P0171 & P0714. Finally they just kept clearing the codes. Now I got it. I have done all the basic test and are OK. Fuel pressure is with in range, no vac. leaks, checked it with carb cleaner while observing the H...
September 28, 2004
2000 Toyota Echo 1.5L Misfire, MIL Lamp on VIN: JTDBT1235Y
P0171: Fuel System Too Lean (Bank 1). Car sets codes P0300 random misfire and P0171 lean mixture. Replaced all four spark plugs, and checked ign. coils and boots. All coils and boots looked OK. The O2 voltage drops to 0.00 at idle, but when you rev. the engine up the O2 sensor voltage moves up and...
September 28, 2004
1995 Lincoln Continental Diamond Anniversary 4.6L MIL Lamp on VIN: 1LNLM97V4S
P0171: bank 1 lean. ... last 6 months with the mil on and codes P0171 & P0714. Finally they just kept clearing the codes. Now I got it. I have done all the basic test and are OK. Fuel pressure is with in range, no vac. leaks, checked it with carb cleaner while observing the H...
September 30, 2004