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P2096 post catalyst fuel trim bank 1 system too lean

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Posted on Jan 02, 2017

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SOURCE: service engine soon light on, says bank 1 and 2 lean

this code sets when more air is entering the system than is designed to. the computer is having to overcompensate by adding more fuel. usually this code is associated with a vacuum leak, either a vacuum hose or a leak at the throttle body gasket, intake gasket, or another gasket on the intake manifold. if your vehicle has a mass air flow sensor (as opposed to a MAP sensor) a dirty or faulty mass air can cause both banks to be lean

Posted on Feb 20, 2010

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Vehicle CEL is on, various codes


P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
Circuit/System Description
The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor.

You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

Sep 03, 2016 | Cars & Trucks

1 Answer

I have an 08 Saturn Astra XR. It won't come out of 1st. Throwing code p2096 post catalyst fuel trim system too lean bank 1. Put on new o2 sensor on both streams and I cleaned out mass air flow. Help?


That code wouldn't cause it not to come out of first gear . How did you retrieve this code P2096 , code reader etc.. This is an invalid code , not listed in Saturn service information . Have DTC'S check by a GM dealer , Chevy . You obviously have a transmission problem not an O2 sensor problem . Some code readers will replace a code with an other if it doesn't have the right one . Software .

Jun 21, 2016 | Saturn Cars & Trucks

1 Answer

P2096 engine code


1st google hit.
P2096 Suzuki - Post Catalyst Fuel Trim System Too Lean
to see this steps read the FSM. it covers this.
lots of tests. not guessing.
Low fuel pressure
- Misfire condition
- Large vacuum leak
- Air leak near sensor
- Plugged catalytic converter
- Lean air/fuel ratio
- Faulty front O2 sensor


Jul 01, 2014 | 2007 Suzuki Swift 1.3

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

Post catalyst fuel trim system too lean Bank1


If the O2 sensors are working correctly, it could be an air leak or a faulty injector. Usually low fuel pressure shows up on both banks.

Jan 15, 2014 | 2001 Dodge Caravan

1 Answer

07 Kia Spectra Code P2626, P2097, P2271, P0171


P0171 System too Lean (Bank 1)
P2097 Post Catalyst Fuel Trim System Too Rich
P2271 O2 Sensor Signal Stuck Rich
P2626 O2 Sensor Pumping Current Trim Circuit/Open
_____________
FGTech Galletto 2

Jan 26, 2013 | 2007 Kia Spectra LX Sedan

1 Answer

P2096


Hi there:
DTC P2096 - Post Catalyst Fuel Trim System Too Lean (Bank 1)

Lean mixture code could be caused by a leakage in the rubber boot that is between the throttle body (similar to a carburetor) and the air cleaner housing. Following are all the tests to be done for a vehicle other than yours... HERE.

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Jul 11, 2012 | 2005 Hyundai Accent

1 Answer

2006 subaru impreza wrx. has a p2096 code. what does it indicate? also is there a way i can clear a check engine light?


This is Subaru's definition for this code... DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1; check this diagram about muffler assembly...

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Oct 09, 2011 | 2006 Subaru Impreza

1 Answer

2007 Hyundai Entourage codes P2187, PP0174,P2189,P2195,P2270,P2272


I've come across these codes before. In almost every case there was an air leak in the intake air hose (hose between the engine air filter & the throttle body). Inspect this hose & tubes attached to it. This is especially true when the lean code includes the comment 'at idle'
P2187 - System too lean at idle Bank 1
P0174 - System too lean Bank 2
P2189 - System too lean at idle Bank 2
P2195 = HO2S Signal Biased/Stuck Lean (Bank 1 Sensor 1)
P2270 = HO2S Signal Stuck Lean (Bank 1 Sensor 2)
P2272 = HO2S Signal Stuck Lean (Bank 2 Sensor 2)

P2187 & P2189 = In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition

Aug 31, 2011 | 2008 Hyundai Entourage

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