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P0171 Diagnostic Trouble Code Discussion for February 2015

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2011 Chevrolet Cruze LT 1.4L Poor Idle Quality, MIL Lamp on VIN: 1G1PF5S94B
P0171: Fuel trim lean. This car came into our shop with poor idle quality and the mil lamp on. We replaced the MAP sensor and cleaned the mass air flow sensor. All the data looks good as far as I can tell except the intake manifold pressure PID. This is not the MAP pressure, that se...
February 05, 2015
2012 Chevrolet Cruze LT 1.4L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: 1G1PF5SC8C
P0171: Fuel trim system lean. Have a 2012 Chevrolet Cruze LT 1.4L Turbo with a runs lean condition, hot, cold at idle or under a load. Have checked fuel pressure and volume and is within specification. Have checked for any unmetered air entering engine and have found nothing. No vacuum lea...
February 12, 2015
2002 Toyota Avalon XL 3.0L MIL Lamp on VIN: 4T1BF28B62
P0171: Fuel System Too Lean (Bank 1). Thanks in advance to any to anybody who takes the time out of their day to help out with my giant headache.I have a 2002 toyota avalon that is giving me a real hard time. The long term fuel trims at idle and cruise are high. 30% at idle and can reach 35% at cr...
February 12, 2015
2009 Nissan Versa S 1.8L MIL Lamp on VIN: 3N1BC11E69
P0171: Fuel system to lean B1. ... back. The customeer now has time to be without car for a little while. P0171 sets in two drive drive cycles. As I posted before I have check several time for vac leaks including smoke test nothing - fuel presure is 51psi - customer replaced maf sensor oe n...
February 16, 2015
2006 Land Rover Range Rover Sport Supercharged 4.2L MIL Lamp on VIN: SALSH23436
P0171: lean bank 1. does anyone know when this purge valve is supposed to give vacuum to the canister. This range rover is supplying vacuum pulses to the canister at idle and when I remove the hose from the canister and block off, long term fuel trims drop to 12%. this valve is ...
February 17, 2015
2006 Chevrolet Impala LTZ 3.9L MIL Lamp on
P0171: Fuel System Lean. ... advance. Getting a reoccurring p0171 lean bank 1 so far I have done a smoke test and found a leaking fitting that goes in the intake plenum for brake booster hose fixed that cleared code. code comes back after 2 mins. Of run ...
February 26, 2015
2010 Ford F-150 STX 4.6L MIL Lamp on VIN: 1FTEX1E81A
P0171: Lean condition bank 1. ... pickup in mil light on runs fine. Pulled 2 codes, p0171 p0174 both banks lean. Check fuel pressure 60psi. Check freeze frame vehicle was at 1800 rpm 49 mph, both long term trims max. Out at 29.7% short trim bank 1 9.3% bank 2 5.5% road test and confrim bot...
February 26, 2015
2010 Ford F-150 STX 4.6L MIL Lamp on VIN: 1FTEX1E81A
P0171: Lean condition bank 1. ... pickup in mil light on runs fine. Pulled 2 codes, p0171 p0174 both banks lean. Check fuel pressure 60psi. Check freeze frame vehicle was at 1800 rpm 49 mph, both long term trims max. Out at 29.7% short trim bank 1 9.3% bank 2 5.5% road test and confrim bot...
February 27, 2015