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P0171 Diagnostic Trouble Code Discussion for June 2004

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
2000 Dodge Dakota 4.7L Poor Fuel Economy, MIL Lamp on VIN: 1B7GG22N1Y
P0171: Fuel System Lean (Bank 1). ... Vehicle came to shop on Friday 5/28 with MIL on. Retreived codes P0171 - bank 1 lean and multiple injector control circuit codes. Found O2 sensor stuck at .02 volts with engine running. Could not force sensor rich. Injector PW, short term and long term fue...
June 01, 2004
2001 Nissan Sentra GXE 1.8L MIL Lamp on VIN: 3N1CB51D61
P0171: Fuel Trim Lean. Customer complains MIL comes on. Scan date shows very slow O2 on bank 1. Sometimes will drop to 000 and stay for some time. Replace bank one O2. Light reoccured. Test for vacuum leaks. Replaced leaking EGR valve. MIL still occurs with same code. All other pa...
June 02, 2004
1997 Mercedes-Benz C280 2.8L MIL Lamp on VIN: WDHA28E9VF
P0171: Fuel Trim Mulfunction. To all Techs. I need some advise on this vehicle, any informations will be truely thankfull for advise. Customer haven't have this problem before, vehicle drive in shop with engine light on, hood up Modis scanner find code P0170 (according AllData information ...
June 03, 2004
1999 Toyota 4Runner Limited 3.4L MIL Lamp on VIN: JT3HN87R3X
P0171: Fuel System Too Lean (Bank 1). My question for the Toyota guys out there is it normal to have a dead A/F sensor and still have other problems. 25-40 miles on the freeway is what it takes to set the CEL again. Oh I did look at the MAF and it appeared clean however I did not have recognizable...
June 07, 2004
1999 Chrysler Sebring JX 2.5L Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: 3C3EL45H9X
P0171: Fuel System Lean (Bank 1). This vehicle has a rough idle and a hesitaion. Compression is 160 across the board. Fuel pressure is 50 PSI. Injector drop test is good, injector flow test is good, have smoked the engine, and found no leaks. Checked timing marks and they are ok. Would appreci...
June 10, 2004
1998 Oldsmobile 88 Royale 3.8L MIL Lamp on, RUNNING LEAN VIN: 1G3HN52K5W
P0171: Fuel System Lean. fuel trim showing lean condition at idle, corrects it self with higher rpm, found 2 vaccum leaks that have been repaired problem still exists,
June 10, 2004
2000 Dodge Caravan 3.0L No Start, Surge, Cuts out, Misfire, MIL Lamp on
P0171: Fuel System Lean (Bank 1). ... for a no start. No, or very low fuel pressure. After some quick checks, I banged on the tank, and it sprung to life. Shut it off, and it would not re-start, without banging on the tank again. Current ramping the pump supported this, and the pattern looked ...
June 19, 2004
2000 Ford Focus SE 2.0L MIL Lamp on VIN: 1FAFP34P8Y
P0171: lean condition. ... no other symtoms, runs fine. Had a P0171 for lean condition, I found the common leaking and deteriorated PCV hose so I replaced it along with the crankcase vent with no noticable improvements in the trim numbers. Long term trim remains at 31-34 %. Anyhow M...
June 19, 2004
1995 Ford Thunderbird LX 4.6L MIL Lamp on VIN: 1FALP62WXS
P0171: Low volts bank1sensor1. ... and P0171 codes. LTFT indicated lean condition. Cleaned debris from MAF and runs fine now. After two days MIL back on... same codes. Scoped the bank1 sensor and see no difference between it and bank 2 sensor. Smoke tested...
June 21, 2004
2000 Dodge Caravan 3.0L No Start, Surge, Cuts out, Misfire, MIL Lamp on
P0171: Fuel System Lean (Bank 1). ... for a no start. No, or very low fuel pressure. After some quick checks, I banged on the tank, and it sprung to life. Shut it off, and it would not re-start, without banging on the tank again. Current ramping the pump supported this, and the pattern looked ...
June 22, 2004
1999 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMZU34E2X
P0171: system too lean bank 1. fuel pressure and delivery system all seems fine, Fuel Trim is high enough to keep setting codes for lean on both banks. Fixed all the vac. leaks that I could find.
June 24, 2004
1996 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMDAS140T
P0171: Bank 1 lean. This Windstar failed an OBD II emission test. Prior to the lean codes I cleaned the EGR ports that were clogged. I had a code for restricted EGR flow. Cleaning of the ports cleared that code. I suspected a MAF problem but the voltage seems normal at idle (.6 V...
June 25, 2004
1996 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMDAS140T
P0171: Bank 1 lean. This Windstar failed an OBD II emission test. Prior to the lean codes I cleaned the EGR ports that were clogged. I had a code for restricted EGR flow. Cleaning of the ports cleared that code. I suspected a MAF problem but the voltage seems normal at idle (.6 V...
June 26, 2004