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System too lean, bank 2, malibu 2009 - 2009 Chevrolet Malibu

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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keithheavili
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SOURCE: got code p0171 system too lean (bank 1)

This is probably referring to problems with your bank 1 oxygen sensor.  Without the vehicle make, model and year I can't tell you where it is located.  However, if you replace your front oxygen sensor that should clear up the problem.  Also, if you do replace it, I always run some fuel injector cleaner through a full tank of gas at the same time.  Hope this helps!

Posted on May 17, 2009

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SOURCE: codes P0171, P0174, P0440

This is usually an oxygen sensor, replace the O2 sensor located above the catalytic converter before replacing the evaporator purge canister.

Posted on Dec 29, 2009

SOURCE: Hi, After changing my air filter & pvc valve

Most likely if you didn't have it before,what you worked on, you have to recheck your work for a vacuum leak

Posted on May 31, 2010

alicantecoli
  • 22219 Answers

SOURCE: I have a 1998 malibu with the code p0171 system to

what this means is bank one is running weak ,this is caused by a problem with the O2 sensor on this side of the engine now a lot of more modern vehicles use two sensors one before the cat and one after the cat ,they are situated in the exhaust down pipe ,now iam not familiar with this vehicle so i cannot say if it has one or two sensors but put you head under the bonnet and see what is waht if it has two sensors then change the one after the cat first ,now their are four wires on a sensor and two of the colours are the same so disconect the plug and test the sensor for continuety on the two wires the same colour ,now if the continuety is ok this means the heater circuit is working ,now the other two wires will show the voltage over time but you will a special meter to check this like a automotive test meter which measures frequency and dwell which i doubt you have so just check the heater circuit on each sensor on the bank 1 and if in doubt just change them for a universal type and in the box comes a diagram on what colour wires go to the appropiate connection on the wiring loom as you will have to cut the plug off and use a strip type block connector unless you buy originals which are expensive compared to auto factor replacements .

Posted on Jan 28, 2011

SOURCE: I have a 2002 Chevy

Not the fuel filter

More like a vacuum leak

Posted on Apr 13, 2011

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1 Answer

Engine light on


P0171 ; Fuel Trim System Lean (Bank 1)
P0174; Fuel Trim too Lean (Bank 2)
fuel trim is system to modify injector pulse if system go lean it will go rich when the system is too much lean and is max.rich it code
look for 02 sensor bank 1 and 2 data
hope it helps

Mar 31, 2014 | 2003 Chevrolet Malibu

1 Answer

Dakota p0171 p0174 taurus


code p0171 refers to system to lean bank 1==causes intake /exhaust leak--AIR system--MAP/MAF sensor--fuel pressure/pump--injectors--HO2s Have a fuel pressure test done on the fuel manifold to check for blocked filter/faulty pump/fuel pressure regulator faults
code p0174 refers to system to lean bank 2 --same causes including hose connection/s
code p0420 refers to catalytic converter system -bank 1 efficiency below threshold==causes catalytic converter--wiring--HO23. Check the cat converter is not cracked inside and the oxygen sensor is working.

Sep 06, 2013 | 2009 Citroen C8 2.0

1 Answer

Engine check light on error code 1 is P0171 system too lean bank 1 error code 2 is P0174 system too lean bank 2


P0171 system too lean bank 1
P0174 system too lean bank 2
links to information on the codes

it means that the O2 sensors in your vehicle detected a lean condition in their respective banks. this could be caused by a dirty MAF (mass air flow) sensor or a vacuum leak downstream from the MAF sensor

sometimes you can clean the MAF with electronics cleaner or brake cleaner but be sure to take it off the vehicle first. be careful not to damage the MAF while spraying the cleaner, and allow it to dry completely before installing it on the vehicle.

May 21, 2011 | 2001 Jaguar S-Type

2 Answers

P2197 p2187 p2177 p2195 p2179 p2189


P2197 - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
P2187 - System Too Lean At Idle Bank 1
P2177 - System Too Lean Off Idle Bank 1
P2195 - Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2179 - System Too Lean Off Idle Bank 2

I am not sure what your Mazda is, but from the sounds of it, both of your Oxygen Sensors are shot. Replace them both, or check for vacuum leaks. It may be a good time to inspect and replace the PCV Valve and PCV Valve hose, too.

Mar 12, 2011 | Mazda MAZDA6 Cars & Trucks

1 Answer

What do the codes 1128, 1129, 1133, and 1134 mean on my Porsche Boxter 2001?


code P1128 02 sensor bank 1 lean
code P1129 02 sensor bank 1 lean to limit
code P1133 02 sensor bank 2 lean
code P1134 02 sensor bank 2 lean to limit

fuel system is lean.

Jan 29, 2011 | 2001 Porsche Boxster

1 Answer

Failed OBDII Diagnstic trouble codes P0761 and O1744 What does this mean?


code P0761-
Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 3 valve
- Shift solenoid 3 valve harness or connectors
- Shift solenoid 3 valve circuit is open or shorted
P0761 FORD Description Shift solenoid valve 3 is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position. When is the code detected? The P0761 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off code O1744- is not a code these are the ones I have found that come close
P0174 1999 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2000 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2001 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2002 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2003 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 FORD Fuel Injection System Too Lean Bank 2

Sep 28, 2010 | 1999 Ford Taurus

2 Answers

P0313;Misfire Detected with low fuel P0171-System too lean{bank1} P0174 System too lean{bank2} drive cycle


P0313 - Misfire Detected with Low Fuel
P0174 -System too Lean (Bank 2).
P0171 -System too Lean (Bank 1).

P0171 and P0174 mean "system too lean" for banks 1

Aug 24, 2010 | 2000 BMW 3 Series

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

1 Answer

I am getting code P0171 system to lean, bank 1 ??


Bank 1 is the cylinder bank that has #1 in it. In your case I believe it is the cylinder bank at the front of the car, number 1 cylinder is to the far left looking at it from the front. The system lean condition could be caused by a leaking intake manifold gasket or a simple O2 sensor that is reading just out of range but not enough to trip a code for a faulty sensor.

Jan 07, 2009 | 1999 Chevrolet Malibu

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