Question about 2002 Chevrolet Silverado

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V8 vortec 2004 running lean bank 1 - 2002 Chevrolet Silverado

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The first thing I would check is the fuel filter. It could be restricted.

Posted on Apr 11, 2011

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Posted on Jan 02, 2017

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Jan 31, 2014 | 2004 Chevrolet TrailBlazer

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2004 chevy silverado 5.3L V8 runs rough and stalls


Well, code 336 is for a problem with the crank sensor, and code 171 is for fuel system too lean bank one which is the side with cylinder one. Since you have checked fuel pressure and I will assume fuel volume is good, the crank sensor or circuit could be at fault.

Jul 09, 2013 | Cars & Trucks

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2001 Chevy Impala 3.8L. P0171 lean fuel code. We have replaced the MAF from a previous code. O2 sensors scan good, as does the fuel pump all within specs. Car is running like junk. 81K, Dropped Cat...


DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

According woth your previous tasks, inspect all vacuum and PCV hoses, replace if necessary.

Oct 04, 2011 | 2004 Chevrolet Impala

1 Answer

What is the dianosis of a 2004 Expedition/ with the (dtc) PO171.


P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.

A code P0171 may mean that one or more of the following has happened:
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.


Hope this helps.

Oct 03, 2011 | 2004 Ford Expedition

1 Answer

Car will start for a few seconds and cut off then wont start at all also has code p0174 and putters bad when i try to give it gas


this trouble code means your system is running to lean on bank 2, Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1. You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration

Feb 12, 2011 | 2004 Cadillac Seville

1 Answer

Check engine light flashing runs rough not firing on all cylinder


take of the fuel filter and blow it out. i had the same problem with a 2008 ford f150 5.4 v8.

Apr 19, 2010 | 2003 Lincoln Navigator

1 Answer

Pluged in the computer to my truck and it said there is a o2 sensor malfunction of bank 2. how do i find it? also it says the truck is running to lean. is this cause by the o2 sensor?


Yes, this too lean runing engine is due of oxygen O2 sensor malfunction. Must be replaced with new one. You can find it very simply on bank 2. The bank 1 of V8 engine is the cylinder bank on the right (passenger's) side of the car, (for Left Hand Drive vehicles). So the bank 2 is placed on the left (driver's) side of the car, (for Left Hand Drive vehicles). The bad oxygen O2 sensor is fitted on bank 2, so you can replace it.

Please rate my response. Thanks!

Apr 11, 2010 | Ford F-150 Cars & Trucks

1 Answer

Yes my truck is 1998 ford f 150 4.2 an i have code po174






DTC code p0174 means "System too lean (Bank 1)"

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exahust). On V6/V8/V10 engines



, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

Jan 09, 2010 | 1999 Ford Windstar

1 Answer

CHECK ENGINE LIGHT ON , WITH CODE SYSTEM TOO LEAN


Possible failed bank 1 sensor 1 oxygen sensor..

Mar 29, 2009 | 1999 Chevrolet Silverado 1500

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